2017 Mercedes-Benz C350e Is Leaking Oil

Address Oil Leaks in Your 2017 Mercedes-Benz C350e Effectively

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Reviewed by
Bo Fader
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 2017 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 2017 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 steps should I take to diagnose the oil leak in my 2017 Mercedes-Benz C350e?

When diagnosing an oil leak in your 2017 Mercedes-Benz C350e, it's essential to adopt a systematic approach that begins with the most straightforward checks. Start by locating the leak; inspect the area beneath your vehicle for any visible oil spots or puddles, which can provide initial clues about the leak's origin. Next, turn your attention to the engine itself, examining critical components such as the oil filter, oil pan, and valve cover gasket for any signs of oil residue or damage. It's also crucial to check the oil level, as a significant drop may indicate a leak that needs immediate attention. For a more precise diagnosis, consider using UV dye, which can illuminate the leak's source when viewed under UV light. If the leak remains elusive, a pressure test can help identify hidden leaks within the oil system. Should these methods not yield results, consulting a qualified mechanic is advisable to ensure a thorough inspection and proper repair. By following this diagnostic approach, you can effectively identify and address the oil leak in your vehicle, ensuring its optimal performance.

What are the common causes of oil leaks in a 2017 Mercedes-Benz C350e?

When diagnosing oil leaks in a 2017 Mercedes-Benz C350e, it's essential to understand the common problems that can arise within the engine's components. One prevalent issue is the degradation of the oil pan gasket, which can wear down over time, leading to leaks. Similarly, a faulty valve cover gasket may allow oil to seep out, indicating a need for replacement. Another potential culprit is the oil filter housing gasket; if this component is compromised, it can result in significant oil loss. Additionally, the seals around the oil cooler can deteriorate, contributing to leaks. Lastly, various oil seals, particularly those on the crankshaft or camshaft, may crack or wear out, further exacerbating the issue. Regular maintenance and timely repairs are crucial to addressing these problems, ensuring the longevity and performance of your vehicle.

How urgent is it to address the oil leak in my 2017 Mercedes-Benz C350e, and what are the potential risks of delaying repairs?

Addressing an oil leak in your 2017 Mercedes-Benz C350e is not just a matter of routine maintenance; it is a critical issue that demands immediate attention. Ignoring this problem can lead to severe engine damage due to insufficient lubrication, which increases friction and heat, ultimately jeopardizing the engine's integrity. Furthermore, a persistent oil leak can significantly diminish your vehicle's performance, resulting in decreased fuel efficiency and power output, which can be frustrating for any driver. Safety is another paramount concern; an oil leak poses a fire hazard if the oil comes into contact with hot engine components, putting both you and your passengers at risk. Additionally, the environmental impact of leaking oil cannot be overlooked, as it can contaminate soil and water sources, contributing to broader ecological issues. Therefore, it is essential to act swiftly and address any oil leaks to maintain your vehicle's performance, ensure safety, and protect the environment.

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2017 Mercedes-Benz C350e Oil Leak Causes & Repair Costs