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If you want to cut down on oil and sludge entering your intake system, fitting a dedicated catch can can help protect long-term engine health. Choosing the right Mercedes-Benz E-Class oil catch can matters because designs vary in how they trap oil, how they fit the vehicle, and how often they need service. This guide presents our shortlist of the top options for the E-Class and explains the practical factors we used to evaluate them, such as filtration efficiency and installation complexity. Read on to see the features that matter most and what to expect from the shortlisted products.
Looking for other parts? See all Mercedes-Benz E-Class parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | TEMSONE Universal 2-Port Aluminum 750ml Baffled Oil Catch Can with Breather Filter and Drain Valve |  |
| Most Popular A crowd favorite that many people choose with confidence | RULLINE 350ml Universal Baffled Oil Catch Can (0046) |  |
| Best Quality Built to a higher standard if you want something more solid | EVIL ENERGY Oil Catch Can — Air Oil Separator, Passenger Side, 3 oz |  |
| Best Budget The cheapest option that still gets the job done reliably | ZNDAW 2-Port Billet Aluminum 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 | muge racing 400ml Baffled Oil Catch Can Kit with Breather Filter |  |
| Best Overall The best all-around choice for most situations | EVIL ENERGY 300ml Baffled Oil Catch Can with NBR Hose Kit |  |
1. TEMSONE Universal 2-Port Aluminum 750ml Baffled Oil Catch Can with Breather Filter and Drain Valve
| Fit Type | Universal |
|---|---|
| Manufacturer | TEMSONE |
| Capacity | 750 ml |
| Material | Aluminum |
This TEMSONE catch can is a straightforward, reliability-minded solution for reducing oil and moisture recirculation from the crankcase ventilation system. It uses a baffled internal layout and an included breather filter to condense and capture oil and water vapor before those contaminants can reach the intake. Typical installation connects the two 3/8 NPT ports to the PCV/CCV plumbing and mounts the can in a convenient under-hood location; the 750 ml capacity means fewer emptying cycles compared with smaller units. The aluminum body is corrosion resistant and the supplied drain valve makes routine service quick and clean. The package includes hose connectors, a hose clamp and a breather, but you will likely need to source appropriate reinforced hoses and mounting hardware for a Mercedes-Benz E-Class application. Some users reported a restrictive brass screen on certain engines and loose threads requiring tape, so check fittings and airflow path during installation. This can offers good build quality and serviceability for owners focused on protecting the engine from carbon buildup and oil contamination.
Best for: Reliability-focused owners who prioritize protecting an E-Class engine from oil vapor and carbon buildup and want a durable, serviceable catch can that reduces maintenance frequency.
Less Ideal for: Drivers who want a plug-and-play Mercedes-specific kit with dedicated hoses and brackets or those unwilling to verify and modify internal screens for compatibility.
- Baffled 750 ml reservoir reduces frequency of draining compared with smaller cans.
- Aluminum construction resists corrosion for long-term under-hood use.
- Includes breather filter, drain valve and basic fittings for easier maintenance.
- Drain valve simplifies emptying collected fluids without disassembly.
- Universal fit requires sourcing Mercedes-specific hoses, brackets, or adapters for proper installation.
- Some units have restrictive internal brass screen that may need modification on certain turbocharged engines.
- Thread fitment on tops has been reported loose and may require sealing tape during install.
Verdict A rugged, serviceable 750 ml catch can that suits E-Class owners focused on long-term engine protection but needs Mercedes-specific hoses and possible minor tweaks for ideal performance.
2. RULLINE 350ml Universal Baffled Oil Catch Can (0046)
| Capacity | 350 Milliliters |
|---|---|
| Material | Aluminum |
| Fit Type | Universal |
| Product Grade | Performance Part |
This RULLINE catch can installs inline with the PCV/CCV ventilation to collect oil and emulsified fuel before it reaches the intake, which helps limit carbon and sludge buildup. It is a 350ml baffled aluminum reservoir with full TIG welds, an included dipstick for level checks, and an upgraded braided hose to replace flimsy rubber lines. Typical use is a simple engine-bay retrofit: mount the can, connect the supplied fittings and hose between the valve and intake, then service the can periodically by removing the dipstick or unscrewing the drain area to empty collected fluid. Practical benefits include corrosion resistance from the aluminum body, a visible dipstick for quick checks, and a sealed design with O-ring fittings to reduce leakage. Limitations are that it is a universal kit so the short bracket and included hose lengths or diameters may not match every Mercedes-Benz E-Class layout and will likely require custom mounting and hose sizing for a clean installation. Also capacity is modest, so frequent checks are needed on engines that produce heavier blow-by.
Best for: Convenience-driven owners who want a straightforward, low-effort upgrade to reduce intake contamination without extensive modification or custom fabrication.
Less Ideal for: Owners seeking a vehicle-specific, plug-and-play catch can with dedicated Mercedes-Benz E-Class mounting hardware and long service intervals should consider a model designed specifically for that application.
- Baffled 350ml aluminum reservoir reduces oil and moisture entering the intake.
- Fully TIG welded body with O-ring sealed fittings to minimize leakage.
- Includes dipstick for easy fluid level checks without disassembly.
- Upgraded braided hose improves durability over basic rubber tubing.
- Universal bracket and hose sizes may not fit Mercedes E-Class without modification.
- Modest 350ml capacity requires more frequent draining on high blow-by engines.
Verdict A budget-friendly, easy-to-service universal catch can that helps protect the intake on Mercedes E-Class cars but will likely need custom mounting and hose fitting for a tidy installation.
3. EVIL ENERGY Oil Catch Can — Air Oil Separator, Passenger Side, 3 oz
| Fitment | Passenger side, vehicle-specific |
|---|---|
| Reservoir capacity | 3 OZ |
| Filter media | Honeycomb aluminum |
| Drain | Rotating non-slip base with O-ring seal |
This EVIL ENERGY catch can is a compact air oil separator built to intercept crankcase vapors and keep oil and contaminants out of the intake tract. It installs in place of the passenger-side PCV routing and includes hoses and quick-connect fittings to reduce adapter needs, so installation is straightforward for someone familiar with engine bays. The unit uses a honeycomb aluminum filter and a rotating, non-slip base that lets you drain collected oil without tools while an O-ring seal helps prevent leaks. For performance-minded owners the catch can reduces intake and valve deposits, which can preserve throttle response and long-term efficiency when running spirited or track driving. Important limitations are its small 3 ounce capacity, which means it needs checking and draining every 500 to 1,000 miles, and it is not CARB-compliant so it cannot be used in California or CARB states. Also some buyers reported missing mounting brackets on certain orders, so verify mount hardware before installation.
Best for: Performance-oriented owners who prioritize cleaner intake and valve surfaces to protect power and throttle response during spirited driving and occasional track use.
Less Ideal for: Owners seeking a low-maintenance, long-interval solution or anyone who must follow California emissions rules should look elsewhere.
- Vehicle-specific design for passenger-side PCV routing reduces fitment modifications
- Honeycomb aluminum filtration traps fine oil vapors before they reach intake components
- Included hoses and quick-connect fittings minimize need for aftermarket adapters
- Tool-free rotating base allows quick drainage of collected oil with an O-ring seal to limit leaks
- Very small 3 ounce reservoir requires frequent inspection and draining
- Not CARB-exempt so illegal for sale or use in California or CARB-equivalent states
- Some units have shipped without mounting brackets requiring additional hardware purchase
Verdict A compact, performance-focused catch can that helps protect intake cleanliness and throttle response but needs frequent draining and is not legal in CARB states.
4. ZNDAW 2-Port Billet Aluminum Oil Catch Can Kit with Breather Filter
| Capacity | 150 ml (5 Fluid Ounces) |
|---|---|
| Material | Aluminum |
| Fit Type | Universal Fit |
| Includes | Breather filter, drain valve, 5 adapters, hose clamp, O-rings |
This ZNDAW oil catch can is a budget-focused two-port separator intended to reduce oil and moisture entering the intake from the PCV system. It mounts in the engine bay and routes crankcase ventilation through the baffled aluminum reservoir, where oil droplets condense and collect in the 150 ml tank. The kit includes a threaded drain valve for easy emptying, a separate breather filter, five adapter fittings with O-rings, a hose clamp, and hardware to simplify installation. Aluminum construction gives good heat and corrosion resistance for routine street use, and the compact size helps it tuck into tight engine bays. Limits to expect are its small 150 ml capacity, which means more frequent draining on engines with heavier blow-by, and the universal fit approach requires choosing the correct adapter and routing for a Mercedes-Benz E-Class application rather than a vehicle-specific bracket or plumbing. For owners on a tight budget who want a straightforward way to reduce intake contamination, this kit delivers basic function with durable materials but without the refinement of larger or OEM-specific systems.
Best for: Budget-conscious Mercedes‑Benz E-Class owners who want a low-cost, durable catch-can to reduce intake contamination and are comfortable adapting a universal kit during installation.
Less Ideal for: Those seeking an OEM-style, vehicle-specific system or a high-capacity can for heavy-blow-by engines should consider purpose-built or larger options instead.
- Billet aluminum body offers good heat and corrosion resistance for long-term street use.
- Includes drain valve and breather filter for convenient maintenance and visible oil removal.
- Multiple adapter fittings and O-rings increase chances of a clean seal during installation.
- Compact footprint makes it easier to fit into tight engine bays.
- Small 150 ml capacity requires frequent checks and draining on engines with higher blow-by.
- Universal kit lacks vehicle-specific mounting hardware, so custom brackets or routing may be needed for a clean Mercedes-Benz E-Class install.
Verdict A durable, no-frills universal catch can that delivers essential oil separation on a tight budget but requires more frequent draining and custom mounting for Mercedes‑Benz E-Class installs.
5. AOCISKA Aluminum Baffled 300ml Oil Catch Can Kit
| Capacity | 300 Milliliters |
|---|---|
| Fit Type | Universal |
| Material | Aluminum |
This aluminum baffled catch can is a universal 300ml reservoir designed to capture oil and water from the PCV/CCV system before it reaches the intake. In use it mounts in the engine bay with the supplied hose kit and traps blow-by vapors on the baffled screen; the bottom drain and built-in dipstick make fluid checks and emptying straightforward. The included rotating baffle design accepts optional steel shot to increase condensation surface area, which helps when running direct injection engines that produce more oil vapor. Its strength is simple, reusable filtering and an aluminum body that resists corrosion. Because it is a universal kit, expect to fabricate or buy a vehicle-specific bracket or longer hose for neat fitment on an E-Class, and assembly must be correct for the baffle to work as intended. The kit does not include a model-specific mounting solution or detailed Mercedes-Benz E-Class fitment instructions, so some mechanical skill is required for a clean installation and routing in tight engine bays.
Best for: Risk-averse mainstream buyers who prioritize protecting a Mercedes-Benz E-Class engine from intake carbon buildup but want a straightforward, serviceable solution rather than a race-focused part.
Less Ideal for: Drivers seeking a plug-and-play, Mercedes-specific drop-in catch can with dedicated mounting hardware and step-by-step instructions should consider vehicle-specific aftermarket units instead.
- Baffled internal design and optional steel ball increase condensation and improve oil separation.
- Aluminum construction offers corrosion resistance and durable, long-term performance.
- Removable bottom drain and built-in dipstick make checking and emptying the reservoir easy.
- Supplied hose kit provides necessary fittings for a basic installation.
- Universal fit requires fabricating or purchasing a Mercedes-specific bracket or longer hose for tidy installation in E-Class engine bays.
- No vehicle-specific installation instructions are included, which can complicate fitment for less experienced installers.
Verdict A durable, serviceable budget-friendly catch can that works for protecting an E-Class engine but needs bracket fabrication or extra hoses for a neat, factory-like installation.
6. muge racing 400ml Baffled Oil Catch Can Kit with Breather Filter
| Capacity | 400 ml |
|---|---|
| Material | Aluminum |
| Included fittings | 3 adapter sizes with O-rings |
| Hose size | 3/8" fuel line included |
This muge racing oil catch can is a budget-conscious baffled separator that collects oil and condensate before it reaches the intake. It installs inline with crankcase or PCV ventilation and can be run sealed or vented using the included breather filter. The 400 ml polished aluminum reservoir and internal baffle help cool vapors into liquid so you can drain accumulated oil with the dipstick without disassembling the can. The kit includes a simple bracket, three adapter fittings with O-rings, hose clamps and a short length of 3/8" hose for a basic install. Practical benefits are clear: it reduces oil contamination of the intake and is lightweight and visually tidy under the hood. Limitations are the thin, short hose supplied and a bracket that may need modification for clean mounting on some installations; a few buyers also reported fitting or minor leakage issues that required thread sealer. For a Mercedes-Benz E-Class owner seeking an inexpensive, entry-level catch can this unit offers solid function if you plan to replace the supplied hose and adapt the mounting to factory locations.
Best for: Practical optimizers who want an affordable way to reduce intake oil contamination on a Mercedes‑Benz E‑Class and are comfortable making minor install improvements for a low-cost upgrade.
Less Ideal for: Those seeking a plug-and-play, vehicle-specific kit with factory-style mounting and high-end fittings should consider a purpose-built Mercedes E-Class specific catch can instead.
- Baffled 400 ml aluminum reservoir cools vapor and captures oil before it reaches the intake
- Includes breather filter and option to run sealed or vented for installation flexibility
- Three adapter fittings with O-rings and hose clamps provide multiple hose connection options
- Lightweight polished aluminum looks tidy under the hood and resists corrosion
- Supplied 3/8" hose is thin and short and often needs replacement for a reliable installation
- Mounting bracket location and holes may not fit factory attachment points and can require fabrication or modification
Verdict A cost-effective, functional baffled catch can for Mercedes‑Benz E‑Class owners who will upgrade the hose and tweak the mount for a reliable installation.
7. EVIL ENERGY 300ml Baffled Oil Catch Can with NBR Hose Kit
| Capacity | 300 Milliliters |
|---|---|
| Hose length | 5 ft (1.5 m) |
| Hose ID | 3/8" |
| Fitting thread | M16×1.5 |
This EVIL ENERGY 300ml baffled oil catch can is a compact, universal kit built to trap oil and moisture before they re-enter the intake system. It uses a removable baffle and supplied steel wool to coalesce oil particles, and the kit includes NBR hose (5 ft, 3/8" ID), clamps, and M16x1.5-threaded fittings for a secure connection. Typical use is inline with PCV/CCV plumbing or as a breather on pre-PCV setups; the can is serviceable by unscrewing the cap to inspect and empty collected oil. Practical benefits include sturdy aluminum construction, effective internal baffling to reduce intake gunk, and a size that fits many engine bays while still holding a useful 300ml of condensate. Important limits are its universal fit approach which may require routing adjustments or extra hose for some layouts, and the warning about increased moisture and potential freezing in cold climates that requires more frequent maintenance. The kit is a good midrange option for drivers who want engine protection without a large, permanent modification.
Best for: Balanced buyers who want a practical, well-built catch can to reduce intake contamination and extend engine life without committing to an oversized or expensive specialty unit.
Less Ideal for: Drivers seeking a vehicle-specific plug-and-play solution or a larger remote-mounted reservoir for heavy-duty or racing applications should consider a model designed specifically for those needs.
- Baffled, serviceable internal design with supplied steel wool to improve oil separation
- Solid aluminum construction and threaded cap for durable, leak-resistant service access
- Includes 5 ft NBR hose and threaded fittings for a complete installation kit
- Compact 300ml capacity balances space savings with useful collection volume
- Universal kit may require additional hose, clamps, or minor bracket modification to fit specific engine bays
- O rings and some small fittings can be fiddly to install and may be tight on threads
- Higher moisture environments risk freezing and require more frequent cleaning to prevent blockages
Verdict A compact, well-made universal 300ml catch can that offers strong value for everyday engine protection but may need extra hose or bracket work for a perfect Mercedes-Benz E-Class fit.
Choosing the Right Mercedes-Benz E-Class Oil Catch Can: Key Factors to Consider
Filtration and Separation Method
How a catch can separates oil from crankcase vapors determines how effectively it prevents oily residue from reaching the intake. Mechanical baffles, coalescing filters, and multi-stage media each have different capture efficiencies and maintenance needs. A more effective separator will trap smaller droplets and reduce fouling of intake valves, but may require more frequent cleaning or a replaceable element. Understanding the trap method helps you balance the level of protection you need against the time and expense of upkeep.
Can Capacity and Drain Design
Capacity affects how often you must service the catch can and how well it handles short bursts of heavy blow-by. Larger cans reduce the frequency of emptying but can be harder to fit in tight engine bays. The drain design is equally important; quick-drain valves or easily removable plugs make maintenance faster and cleaner. Consider where the drain points and whether you can access them without removing other components from the engine compartment.
Fitment and Mounting Options
Space is often limited on the E-Class, so a catch can that includes vehicle-specific mounting hardware or a flexible bracket system is easier to install securely. Proper mounting prevents vibration and hose strain that could lead to leaks. Confirm that the kit provides clear mounting locations and that hoses reach without tight bends. A well-designed mounting solution minimizes interference with other engine components and reduces the chance of incidental damage during installation.
Hose Quality and Routing
Hose material and routing determine durability and long-term sealing. Use hoses rated for oil vapor, heat, and crankcase pressures to avoid softening or collapse. Routing should avoid sharp bends and contact with hot surfaces or moving parts. Good kits include appropriately sized hose with fittings and clamps; poor hose choices can undermine even a well-designed catch can by allowing leaks or collapsing under vacuum.
Serviceability and Access
How easy it is to inspect and clean a catch can affects whether it will actually be maintained. Features like clear sight tubes, magnetic drain plugs that capture metallic particles, and user-friendly disassembly save time during routine checks. Also consider how often the manufacturer suggests servicing based on capacity and expected blow-by rates. Designs that facilitate quick emptying and cleaning encourage proper upkeep and better long-term protection for the engine.
Materials and Corrosion Resistance
Materials affect longevity in a harsh under-hood environment. Aluminum, stainless steel, and high-grade plastics each offer different tradeoffs in weight, corrosion resistance, and durability. Corrosion-resistant finishes and robust fittings reduce the chance of leaks or failure over time. Choose a construction that matches the local climate and expected exposure to road salts and moisture to ensure consistent performance.
FAQ
Do I need an oil catch can for my Mercedes-Benz E-Class?
It depends on your driving habits and engine type. Catch cans are often used to reduce oil vapor and deposits in the intake, which can be more important for engines with direct injection or for vehicles driven hard or with frequent short trips. Evaluate whether you are experiencing excessive oil in the intake or plan modifications that increase crankcase pressure.
How often should I empty a catch can?
Service interval varies by engine and driving conditions, but many owners inspect the can every oil change and empty as needed. Engines with higher blow-by or frequent short trips may require more frequent draining. Check the can regularly during the first few months to establish a baseline interval for your driving pattern.
Will installing a catch can affect engine warranties?
Warranties and policies vary by region and dealer. Installing aftermarket parts can sometimes complicate warranty claims if a failure is linked to the modification. If warranty coverage is a concern, document the installation and follow factory service recommendations, and consult your local service facility about their policies.
Can I install a catch can myself on an E-Class?
Many catch can kits are designed for DIY installation, but complexity depends on the kit and engine layout. Expect to work in a confined space and to route hoses carefully. If you are not comfortable working in the engine bay or lack basic tools, professional installation ensures secure mounting and correct hose routing.
How does a catch can interact with the PCV system?
A catch can sits inline with the crankcase ventilation hoses to capture oil and condensates before vapors re-enter the intake. It does not change how the PCV valve functions, but it intercepts oily vapors that the PCV system would otherwise route back into the manifold. Proper installation ensures the ventilation system continues to operate as intended while reducing contaminant carryover.
How We Chose the Best Mercedes-Benz E-Class Oil Catch Can
Our selection process focused on features and fitment details that are most relevant to Mercedes-Benz E-Class owners. We prioritized catch cans with proven oil separation methods, measured or clearly stated can capacity, and durable materials that resist corrosion and heat. Ease of installation and the availability of vehicle-specific mounting kits or clear hose routing instructions were essential, since tight engine bays make installation more demanding on the E-Class. We also considered maintenance aspects such as drain accessibility and whether the cans include reusable or replaceable filtration elements. Exclusions: we left out generic or unspecified units without clear fitment info, poorly documented designs, or products lacking basic safety features like secure mounting points. The final list balances real-world usability, serviceability, and engineering attributes that actually affect performance for Mercedes-Benz E-Class engines.
Our full evaluation process is outlined in our review methodology.
Conclusion
Prioritize separation efficiency, fitment, and serviceability when choosing a Mercedes-Benz E-Class oil catch can. The best option for you balances how well it traps oil, how easily it fits and mounts in the available space, and how simple it is to clean and maintain. Consider the tradeoffs between larger capacity and installation complexity, and pick a design whose maintenance needs match the time you are willing to spend.
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