2013 Mercedes-Benz C350 Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2013 Mercedes-Benz C350 and How to Address Them

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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 2013 Mercedes-Benz C350 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 2013 Mercedes-Benz C350 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 initial diagnostic steps to identify the source of an oil leak in a 2013 Mercedes-Benz C350?

To effectively identify the source of an oil leak in your 2013 Mercedes-Benz C350, start with a thorough visual inspection of the engine and undercarriage. Look for any visible signs of oil, such as puddles or stains, which can help you narrow down the potential leak areas. Next, check the oil levels to determine if there has been a significant loss, indicating a leak. Pay special attention to the oil filter and drain plug, as these components can often be the culprits behind leaks if they are loose or damaged. Additionally, inspect the gaskets and seals, particularly the valve cover gasket and oil pan gasket, since these are common points for oil to escape. If the leak remains elusive, consider performing a pressure test on the oil system to uncover hidden leaks. For a more advanced approach, adding UV dye to the engine oil can be beneficial; when illuminated with a UV light, the dye will reveal the exact location of the leak. By following these steps, you can systematically diagnose and address the oil leak issue in your vehicle.

What are the common causes of oil leaks in a 2013 Mercedes-Benz C350?

When dealing with oil leaks in a 2013 Mercedes-Benz C350, it's crucial to understand the common culprits that may be at play. One frequent issue is the degradation of the oil pan gasket, which can lead to oil seeping from the bottom of the engine over time. Additionally, valve cover gasket leaks are another common problem, where worn gaskets allow oil to escape onto the engine, creating visible leaks. The oil filter housing gasket can also fail, resulting in leaks around the oil filter area, while deteriorating oil cooler seals may cause oil to leak from the cooler itself, often leaving spots on the ground beneath the vehicle. Lastly, a leaking rear main seal can lead to oil escaping from the back of the engine or the transmission bell housing. Addressing these leaks promptly is essential to prevent further engine damage and maintain optimal vehicle performance, making regular inspections and maintenance key for any DIY enthusiast looking to keep their C350 in top shape.

How urgent is it to address the oil leak in my 2013 Mercedes-Benz C350?

Addressing an oil leak in your 2013 Mercedes-Benz C350 is not just a matter of routine maintenance; it is an urgent issue that requires immediate attention. An oil leak can significantly reduce oil levels, leading to inadequate lubrication of engine components, which may result in severe engine damage over time. Furthermore, neglecting this issue can cause the engine to overheat, potentially leading to costly repairs or even complete engine failure. The safety implications are equally concerning, as leaking oil can drip onto hot engine parts, creating a fire hazard. Therefore, it is crucial to act swiftly and resolve any oil leaks to safeguard your vehicle's performance and ensure your safety on the road.

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