Note: This article contains affiliate links. If you click on these links and make a purchase, I may earn a small commission at no extra cost to you. This helps support my research and content. Read my full affiliate disclosure here.
If you drive a Mercedes-Benz ML-Class and want to reduce intake contamination and oil-related deposits, choosing the right oil catch can matters. The wrong unit can be hard to install or offer poor separation, while the right one helps limit oil vapor and sludge entering the intake and intake-valve area. This guide covers seven shortlisted oil catch can options specifically suited to the ML-Class, each selected for real-world fitment, build quality, and separation performance.Below you will find the selection criteria and the key traits to weigh before picking a unit, followed by the curated list of top picks and practical notes to help with installation.
Looking for other parts? See all Mercedes-Benz ML-Class parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | TEMSONE Universal 2-Port 750ml Baffled Aluminum Oil Catch Can with Breather Filter |  |
| Most Popular A crowd favorite that many people choose with confidence | SPEEDWOW 300ML Baffled Oil Catch Can with Hose Kit |  |
| Best Quality Built to a higher standard if you want something more solid | EVIL ENERGY 300ml Baffled Oil Catch Can with NBR Hose Kit |  |
| Best Budget The cheapest option that still gets the job done reliably | ZNDAW 150ml Aluminum Baffled Oil Catch Can Kit with Breather Filter |  |
| Most Sold A high-volume bestseller chosen again and again | AOCISKA Aluminum Baffled 300ml Oil Catch Can Kit |  |
| Best Value for Money The sweet spot between price and what you get | RULLINE 350ml Universal Baffled Aluminum Oil Catch Can |  |
| Best Overall The best all-around choice for most situations | EVIL ENERGY 10AN 750ml Oil Catch Can with 10ft Nylon-Braided Fuel Hose Kit |  |
1. TEMSONE Universal 2-Port 750ml Baffled Aluminum Oil Catch Can with Breather Filter
| Fit Type | Universal |
|---|---|
| Manufacturer | TEMSONE |
| Fuel Type | Gasoline |
| Capacity | 750 ml |
This TEMSONE catch can collects oil and moisture from the PCV/CCV system to reduce carbon buildup in the intake. The baffled internal path and included breather filter separate oil and vapor, while the 750 ml reservoir and threaded drain valve make maintenance straightforward. It is made from aluminum for corrosion resistance and feels solidly built for under-hood use. The kit arrives with basic fittings and a hose clamp but does not include reinforced rubber hoses, so expect to source Mercedes-compatible lines and mounting hardware for a clean install on an ML-Class. Some users report the brass screen can be restrictive on certain turbo setups, so you may want to test flow or modify internals if your engine is turbocharged. For a reliability-focused owner the large capacity and durable construction mean less frequent servicing and long-term protection against intake contamination, but professional fitment or careful plumbing is recommended to ensure correct crankcase ventilation on a Mercedes-Benz ML-Class.
Best for: Reliability-focused Mercedes-Benz ML-Class owners who prioritize long-term engine cleanliness and want a durable, service-reducing add-on to limit intake carbon buildup.
Less Ideal for: Drivers who want a plug-and-play, vehicle-specific kit with hoses and brackets included or those unwilling to modify internal flow elements for turbo engines.
- Large 750 ml capacity reduces how often you need to empty the can
- Baffled internal design and breather filter improve oil/vapor separation
- Aluminum construction resists corrosion and holds up under the hood
- Includes drain valve for clean, easy fluid removal
- Hoses are not included so additional Mercedes-compatible lines and fittings are required
- Brass screen can be overly restrictive on some turbocharged engines, possibly needing modification
Verdict A sturdy, high-capacity universal catch can that suits reliability-minded ML-Class owners but requires sourcing hoses and careful fitment for best results.
2. SPEEDWOW 300ML Baffled Oil Catch Can with Hose Kit
| Fit Type | Universal Fit |
|---|---|
| Fuel Type | Gasoline |
| Manufacturer | SPEEDWOW |
| Item model number | 1 |
This SPEEDWOW catch can captures oil and moisture from the PCV/CCV airflow before vapors reach the intake, using an internal baffle and a removable bottom for draining. Installation is a hands-on, under-hood job that typically routes the supplied NBR 3/8" hose between the PCV and intake; the kit includes clamps, a mounting bracket, Teflon tape, and a removable dipstick that doubles as a service port. In use the can collects condensate and oily residue, reducing carbon buildup on intake valves and helping maintain smoother idling and combustion over time. Practical advantages include the reusable design, easy draining via the threaded base, and the dipstick for quick level checks. Limitations to note are the compact 300ml capacity which means more frequent emptying on high-blow-by engines and that some installers replace the supplied clamps or tweak the bracket for a better fit in tight Mercedes engine bays. Also avoid fitting the included filter on the closed PCV side since that can upset crankcase vacuum. For ML-Class owners this is a convenient, mostly complete kit that needs minor hardware upgrades for a worry-free install.
Best for: Convenience-driven buyers who want a mostly complete, easy-to-install catch can kit to reduce intake contamination with minimal parts shopping and straightforward maintenance.
Less Ideal for: Owners seeking a large-capacity or maintenance-free solution for heavy-duty use should consider larger or multi-stage units rather than this compact 300ml kit.
- Baffled internal design and removable bottom make draining and maintenance straightforward.
- Includes hoses, clamps, bracket, and Teflon tape so fewer extra parts are required for a basic install.
- Dipstick provides a quick visual fill check and can be used as a service suction/drain port.
- NBR 3/8" hose resists oil and heat so supplied lines are suitable for typical crankcase vapor routing.
- 300ml reservoir is small for heavily used or high-blow-by engines and will need frequent emptying.
- Included clamps and bracket may require upgrading or modification for a secure fit in some engine bays.
- Markings and port orientation have inconsistent labeling in some units, which can cause initial confusion during installation.
Verdict A compact, convenient catch can kit that works well for routine maintenance on Mercedes ML-Class engines but may need minor clamp or bracket upgrades and frequent emptying under heavy use.
3. EVIL ENERGY 300ml Baffled Oil Catch Can with NBR Hose Kit
| Capacity | 300 Milliliters |
|---|---|
| Hose length | 5ft (1.5m) NBR |
| Hose ID | 3/8" |
| Fitting thread | M16×1.5 |
This EVIL ENERGY catch can is a compact, baffled aluminum unit intended to intercept crankcase vapors before they reenter the intake. It installs inline with PCV hoses or as a vent on pre-PCV setups and includes a removable baffle and steel wool to improve coalescing of oil particles. The kit ships with a 5ft NBR hose rated for heat and wear, M16x1.5 threaded inlet/outlet fittings, clamps, and a mounting bracket so it can be tucked into an engine bay. For Mercedes-Benz ML-Class owners focused on performance, the can helps reduce carbon buildup on intake valves and throttle components, which is especially useful on direct-injection V6 and V8 engines. Practical benefits include durable aluminum construction, easy visual inspection and drain access, and a small 300ml size that fits tight spaces. Limitations are that the kit is universal rather than model-specific so you may need extra hose length, different fittings, or minor bracket modifications for a neat ML-Class installation, and the manufacturer warns that moisture can freeze in very cold climates requiring more frequent checks.
Best for: Performance-oriented Mercedes-Benz ML-Class owners who prioritize protecting intake valves and maintaining throttle response on direct-injection engines and are comfortable adapting a universal kit for a clean install.
Less Ideal for: Buyers seeking a plug-and-play, vehicle-specific solution with exact factory-style fittings and brackets should consider model-specific kits instead.
- Baffled internal design with removable steel wool improves oil separation and reduces intake contamination.
- Solid aluminum construction and threaded cap provide durable, serviceable hardware.
- Includes a 5ft NBR hose and basic mounting hardware for straightforward universal installs.
- Compact 300ml capacity fits into tighter engine bays common on ML-Class models.
- Universal fittings and supplied hose sizes may not match Mercedes-specific PCV connections and can require additional parts or modification.
- Small capacity means more frequent draining on high blow-by engines compared with larger catch cans.
Verdict A well-built, performance-focused 300ml baffled catch can that protects ML-Class engines but may need extra hoses or fittings for a factory-style installation.
4. ZNDAW 150ml Aluminum Baffled Oil Catch Can Kit with Breather Filter
| Capacity | 150 ml (5 Fl Oz) |
|---|---|
| Material | Aluminum |
| Fit Type | Universal |
| Included | Breather filter, drain valve, 5 adapters, O-rings, hose clamp |
This ZNDAW catch can captures oil and condensate from the PCV/valve cover breather before it reaches the intake, helping reduce carbon and sludge buildup in turbocharged and naturally aspirated engines. It is a compact, billet-style reservoir with internal baffling and a threaded drain valve so you can empty the 150 ml tank without removing the unit. The kit includes a breather filter, five adapter fittings and O-rings to match common hose sizes, a hose clamp and mounting hardware, which simplifies installation in tight engine bays. Aluminum construction offers corrosion and heat resistance expected under engine-hood conditions, though the universal fit approach means you may need to choose and seal the correct adapter for a Mercedes ML-Class application. The can is practical for maintenance-minded owners wanting to limit intake contamination, but its 150 ml capacity means more frequent checks on high-oil-consumption engines and the universal plumbing requires careful routing to avoid heat sources.
Best for: Budget-conscious Mercedes ML owners focused on basic engine preservation and willing to perform a simple DIY installation and periodic maintenance.
Less Ideal for: Drivers seeking a large-capacity or vehicle-specific catch can solution or those who prefer a plug-and-play, model-tailored kit with dedicated brackets and hoses.
- Solid aluminum body resists corrosion and engine-heat exposure.
- Baffled design and breather filter reduce oil and moisture entering the intake.
- Includes drain valve for easy, mess-free emptying.
- Multiple adapter fittings and O-rings simplify matching common hose diameters.
- Small 150 ml capacity requires more frequent draining on engines that vent more oil.
- Universal fit means additional effort to select and seal the correct adapter and mount for Mercedes ML-Class installations.
Verdict A low-cost, aluminum baffled catch can that offers basic protection for ML-Class intakes but demands regular draining and some DIY fitment work.
5. AOCISKA Aluminum Baffled 300ml Oil Catch Can Kit
| Capacity | 300 Milliliters |
|---|---|
| Fit Type | Universal |
| Fuel Type | Petroleum |
| Product Grade | like new |
This AOCISKA catch can is a compact, universal baffled reservoir designed to intercept oil and condensate from the PCV/CCV before it reaches the intake. It installs inline with factory crankcase ventilation hoses and uses an internal baffle and optional steel ball to increase condensation and oil separation. The can includes a removable drain plug and a dipstick for quick level checks, so you can empty it without removing the unit. Built from aluminum, it is lightweight and resists corrosion for long-term service. Because this is a universal kit it may require fabricating a bracket or extending hoses to fit a Mercedes-Benz ML-Class, and the package does not include a vehicle-specific mounting bracket. Also follow the maker's note about frequent draining in freezing conditions to avoid icing. For a risk-averse buyer wanting a straightforward, factory-quality-minded way to reduce intake oil contamination on an ML-Class, this provides a practical, reusable solution if you are prepared to adapt the kit to the vehicle.
Best for: A risk-averse mainstream buyer who wants a simple, factory-quality method to limit oil and carbon buildup in a Mercedes-Benz ML-Class intake without major engine modification.
Less Ideal for: Owners seeking a plug-and-play, vehicle-specific kit with dedicated mounting hardware and instructions should consider model-specific options instead.
- Baffled internal design improves oil and water separation compared with a plain reservoir.
- Built-in dipstick and removable drain make checking and emptying the can straightforward.
- Aluminum construction offers corrosion resistance and durable service life.
- Comes with basic hose kit so common installations can be completed without many extra parts.
- Universal fit requires custom mounting or extra hose for proper installation on an ML-Class.
- No vehicle-specific bracket or instructions provided, which adds installation time for non-experts.
Verdict A compact, aluminum baffled catch can that provides reusable oil separation for an ML-Class but needs custom mounting and hose routing for a clean install.
6. RULLINE 350ml Universal Baffled Aluminum Oil Catch Can
| Capacity | 350 Milliliters |
|---|---|
| Fuel Type | Gasoline |
| Product Grade | Performance Part |
| Fit Type | Universal |
The RULLINE 350ml oil catch can is a simple, budget-friendly unit that captures oil and moisture from crankcase ventilation before vapors reach the intake. It installs inline between the PCV/CCV and intake using the included adapters and braided hose, and the internal baffle helps separate liquids from blow-by gas so the collected fluid stays in the reservoir. The can is fully tig welded, uses an aluminum body and O-ring sealed fittings to reduce leaks, and includes a dipstick for quick level checks without disassembly. Practical benefits for Mercedes-Benz ML-Class owners include reduced carbon and sludge buildup on intake components and a small footprint that fits confined engine bays. Limitations are the universal nature of the kit: you may need different hose lengths, clamps, or a custom bracket to suit ML-Class routing, and the 350ml capacity requires periodic draining on higher-mileage or forced-induction engines. The supplied hose clamps and mounting bracket are basic, so expect minor follow-up purchases for a tidy, durable installation.
Best for: Practical optimizers looking for an affordable, no-frills way to reduce intake carbon and keep an ML-Class engine cleaner without spending on a premium branded system.
Less Ideal for: Drivers seeking a vehicle-specific, plug-and-play kit with custom mounting and exact hose lengths should consider dedicated ML-Class solutions instead.
- Baffled internal design improves oil separation and keeps collected fluid in the reservoir.
- Fully tig welded aluminum construction with O-ring fittings reduces risk of leaks.
- Includes dipstick for quick level checks without disassembly.
- Braided hose included is more durable than cheap rubber tubing.
- Universal fittings and short hose length may require additional hoses, clamps, or adapters for a clean fit in ML-Class engine bays.
- Supplied mounting bracket is generic and often needs replacement or modification for secure installation.
Verdict A cost-effective, compact catch can that reduces intake contamination on Mercedes ML-Class cars but may need minor parts and mounting work for a neat, vehicle-specific installation.
7. EVIL ENERGY 10AN 750ml Oil Catch Can with 10ft Nylon-Braided Fuel Hose Kit
| Capacity | 750ml |
|---|---|
| Hose length | 10 feet |
| Hose inner diameter | 0.56 inch (14.22mm) |
| Working pressure | 500 PSI |
| Operating temperature | -40°F to 257°F |
This EVIL ENERGY kit combines a 750ml baffled catch can, a breather/filter option, and a 10AN nylon-braided CPE fuel hose with swivel AN fittings so you can route crankcase ventilation away from the intake on Mercedes-Benz ML-Class engines. It installs inline with PCV/CCV hoses or as a vented breather for pre-PCV setups, captures oil and blow-by to reduce intake valve and throttle body deposits, and uses a bottom drain valve and o-ring sealed threads for easier maintenance and leak control. The braided hose is rated for high working and burst pressures and the swivel fittings simplify tight engine-bay routing. Practical benefits are cleaner intake plumbing, less sticky carbon buildup over time, and straightforward periodic draining without disassembly. Limitations to consider are the universal fitment which may require custom brackets or hose trimming for some ML-Class model years and that baffle/filter effectiveness varies by driving style so frequent checks are recommended for high-mileage or forced-induction setups.
Best for: A balanced all-round buyer who wants an affordable, functional catch can to reduce intake oil contamination and perform routine maintenance without overpaying for a brand-specific unit.
Less Ideal for: Owners seeking a plug-and-play, vehicle-specific replacement with factory-style brackets or those who prioritize highest-end materials and precision fit should consider model-specific options instead.
- Generous 750ml capacity reduces how often you need to empty it
- Bottom drain valve and o-ring sealed threads make servicing quick and cleaner
- 10ft nylon-braided CPE hose with swivel AN fittings eases routing in tight engine bays
- Includes breather filter option so it can be used vented or inline
- Universal kit may need custom mounting hardware or hose modifications for some ML-Class engine layouts
- Not a brand-specific engineered solution so fit and finish vary compared with OEM-style catch cans
Verdict A capable, budget-minded catch can kit that cleans crankcase vapors and offers easy servicing, but you may need to adapt mounts and hoses for a perfect ML-Class fit.
Choosing the Right Mercedes-Benz ML-Class Oil Catch Can: Key Factors to Consider
Separation Method and Filtration Efficiency
How the catch can separates oil from crankcase vapors directly affects its effectiveness. Units that use multiple stages of baffles, mesh, or coalescing media will generally capture finer droplets and entrained oil better than single-chamber designs.
Better separation reduces the amount of oil and solvent reaching the intake, which in turn limits carbon buildup and preserves combustion consistency. When evaluating performance, consider manufacturer descriptions of micrometer-level filtration, the presence of internal baffling, and whether the design encourages condensation and drainage rather than re-entrainment.
Fitment and Mounting Location
Space availability and hose routing in the ML-Class engine bay will determine how and where a catch can can be mounted. A unit with multiple bracketing options or a compact footprint makes it easier to position without interfering with other components.
Consider whether the can’s inlet and outlet ports line up with your vehicle’s PCV or crankcase hoses to avoid tight bends that can restrict flow or stress fittings. Secure mounting is important to prevent vibration-related fatigue of hoses and clamps.
Material and Corrosion Resistance
Catch cans operate in a hot, chemically active environment, so material choice matters. Aluminum and stainless steel housings resist corrosion from oil and condensation better than some coated or plated materials that may degrade over time.
Pay attention to the quality of fittings and clamps as well; brass or stainless fittings with reliable sealing threads reduce the chance of leaks. A robust finish and durable seals help the unit remain serviceable through multiple maintenance cycles.
Serviceability and Drain System
Regularly removing accumulated oil is necessary for continued effectiveness. Units with easy-access drain valves, removable sight bowls, or transparent collection chambers make inspection and emptying quicker and cleaner.
A well-placed drain that can be operated without dismounting the can reduces maintenance time. Consider whether the drain mechanism allows for controlled draining or collection into a container to avoid spills.
Hose and Fitting Compatibility
Compatibility with OEM hose diameters and common connector types reduces the need for adapters and minimizes potential leak points. Look for units that include or clearly specify the hose sizes and clamps required for a secure connection to the ML-Class PCV system.
Also consider whether the catch can supports baffled hose routing or provides fittings at angles that simplify a smooth, kink-free path. Proper sealing at connections is essential to maintain correct crankcase ventilation vacuum and avoid creating boost or vacuum leaks.
Internal Capacity and Collection Volume
The internal capacity determines how often you will need to service the can. Larger collection volumes are useful for vehicles with heavier blow-by or for owners who prefer longer service intervals between drains.
However, a larger can may be harder to fit in tight engine bays, so balance volume against available space and expected oil carryover. Transparent or marked chambers help you monitor fill level and avoid overflows.
FAQ
Do I need an oil catch can on a Mercedes-Benz ML-Class?
An oil catch can is often used to reduce oil and condensate entering the intake through the PCV system. It can help limit intake-valve deposits and maintain cleaner intake passages, especially on engines prone to oil blow-by or frequent short trips. The benefit depends on your vehicle’s condition and driving patterns.
How often should the catch can be emptied?
Drain intervals vary with driving style, engine condition, and catch can capacity. Many owners check the can every few thousand miles initially to establish how quickly it fills. Vehicles that show heavier oil carryover will require more frequent draining, while low-mileage or lightly used cars may need attention less often.
Will installing a catch can affect engine performance or check-engine lights?
A properly installed catch can that maintains the correct hose routing and seals should not trigger fault codes. It is important to preserve vacuum lines and avoid introducing restrictions or leaks. Using compatible fittings and routing hoses to replicate the OEM flow path minimizes the risk of performance or diagnostic issues.
Can I install a catch can myself?
Many catch cans are designed for user installation and include brackets and fittings, but difficulty varies. Basic mechanical skills and familiarization with the ML-Class engine bay are helpful. If routing requires removal of components or custom brackets, professional installation can ensure correct placement and leak-free connections.
What maintenance is required beyond draining the can?
Beyond regular draining, inspect hoses and clamps for deterioration or loosening, and check fittings for signs of leakage. Periodically verify that internal baffles or filters remain intact. Cleaning or replacing internal media is rarely frequent but may be necessary if you notice reduced separation performance.
How We Chose the Best Mercedes-Benz ML-Class Oil Catch Can
We prioritized components that address the specific routing and space constraints of the Mercedes-Benz ML-Class while focusing on separation performance, materials, ease of installation, and maintenance access. Our evaluation emphasized filtration media and internal baffling or coalescing stages that determine how effectively blow-by oil is removed from PCV and crankcase ventilation streams. Fitment and mounting options were judged for compatibility with the ML-Class engine bay layout and for minimizing hose kinks or excessive rerouting.Durability factors included corrosion-resistant materials and reliable fittings to resist leaks under vacuum and heat. We also considered serviceability features such as clear sight bowls or accessible drain points to make scheduled emptying straightforward. Units that required extensive custom fabrication or that lacked secure mounting paths were excluded. The resulting list reflects products that balance reliable oil separation, sensible installation guidance, and practical maintenance features for ML-Class owners.
Our full evaluation process is outlined in our review methodology.
Conclusion
Choosing the right oil catch can for a Mercedes-Benz ML-Class comes down to effective separation, proper fitment, and straightforward serviceability. Prioritize units with proven multi-stage separation, secure mounting options that suit the ML-Class engine bay, and durable materials to withstand heat and oil exposure.Balance collection volume with available space and choose fittings that match OEM hose sizes to avoid added adapters. Regular inspection and timely draining will keep the system working and help preserve intake cleanliness over time.
Explore More:
- Check out all Mercedes-Benz ML-Class parts & accessories
- Explore Oil Catch Cans Maintenance & Repair Guides
- Explore Engine
- Browse all Auto Parts
