2016 Mercedes-Benz C350e Is Leaking Oil

Address Oil Leaks in Your 2016 Mercedes-Benz C350e Effectively

Find Repair Location
Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
80% chance it's the
Oil System Components
0%
20% chance it's the
Engine Gaskets
The most common reasons a 2016 Mercedes-Benz C350e is leaking oil are oil system component failure and leaking engine gaskets.
  • Oil System Components: A worn or damaged oil pump or filter can lead to low oil pressure, resulting in inadequate lubrication and potential engine damage.
  • Engine Gaskets: A worn or damaged engine gasket can lead to oil or coolant leaks, resulting in engine overheating or loss of lubrication.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2016 Mercedes-Benz C350e is leaking oil?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

Oil pans don't wear out or break like other parts, they generally only need to be replaced because of external damage from an accident or an improperly tightened drain plug. The main symptom you will experience is an oil leak underneath the engine of your car. The oil that leaks from a damaged oil pan will range from dark brown to dark black. If the leak is large enough or occurs for long enough the oil level will be low enough to turn the oil pressure or low oil level warning light on.

A bad oil level sensor may cause a false reading of the engine oil level. The oil level warning light may illuminate even when the oil level (checked manually) is within an acceptable range. The warning light may also come on and off intermittently if the sensor is faulty. An error code may be sent to the PCM and a check engine light may come on the dashboard as well if the sensor is bad.

The engine oil pressure warning light will come on if the engine oil pressure is low, or if the oil pressure sensor is faulty. In either case, engine power may be reduced significantly. The check engine light may also illuminate, and an on-board diagnostic (OBD) trouble code will be stored in the vehicle's computer.

What are the steps to diagnose the oil leak in a 2016 Mercedes-Benz C350e?

To effectively diagnose an oil leak in your 2016 Mercedes-Benz C350e, begin with a thorough visual inspection of the engine and undercarriage, as this can often reveal the source of the leak through visible oil drips or pools. Next, check the oil levels to assess if there has been a significant loss, which may indicate a leak. Pay special attention to the oil filter and drain plug, ensuring they are secure and free from any signs of leakage. Inspecting the gaskets and seals is crucial, as worn or damaged components can lead to oil leaks. If the source remains elusive, consider performing a pressure test on the oil system to help pinpoint the leak's location. For smaller leaks, adding UV dye to the engine oil can be an effective method to trace the source under UV light. If these steps do not yield results, consulting a qualified mechanic is advisable for a professional diagnosis and repair. By following this structured approach, you can systematically identify and address oil leaks in your vehicle.

What are the common causes of oil leaks in a 2016 Mercedes-Benz C350e?

When dealing with oil leaks in a 2016 Mercedes-Benz C350e, it's crucial to understand the common culprits that may be at play. One frequent issue is a degraded or damaged oil pan gasket, which can deteriorate over time and lead to significant leaks. Additionally, the valve cover gasket is another common source of leaks; as it ages, it can become brittle, allowing oil to escape from the top of the engine. Another area to inspect is the oil filter housing gasket, which can develop leaks around the filter housing, resulting in oil seepage. Furthermore, the seals around the oil cooler can also degrade, contributing to oil leaks. Lastly, various oil seals throughout the engine, such as those on the crankshaft or camshaft, may crack or wear out, leading to further oil loss. Addressing these issues promptly is essential to prevent engine damage and ensure the vehicle operates smoothly. Regular maintenance and thorough inspections can help DIY enthusiasts catch these problems early, allowing for effective repairs and maintaining the vehicle's performance.

How urgent is it to address the oil leak in my 2016 Mercedes-Benz C350e?

When dealing with an oil leak in your 2016 Mercedes-Benz C350e, understanding the urgency of the situation is crucial. The severity of the leak plays a significant role in determining how quickly you should act. A minor leak may allow for some delay, but a major leak demands immediate attention to prevent serious engine damage. Oil is vital for lubricating engine components, and a leak can lead to insufficient lubrication, resulting in overheating and potential engine failure. Moreover, oil leaks pose environmental risks, as spilled oil can contaminate waterways, making prompt repairs essential for ecological preservation. Safety is another critical factor; oil on hot engine parts can increase fire risks, while leaking oil can create slippery surfaces, heightening the chances of accidents. Financially, addressing an oil leak sooner rather than later can save you from more extensive and costly repairs down the line. Therefore, regardless of the leak's severity, it is generally advisable to act quickly to mitigate risks to your vehicle, safety, and the environment.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.