Mercedes-Benz CLS63 AMG S Is Leaking Oil

Common Causes of Oil Leaks in Your Mercedes-Benz CLS63 AMG S and How to Address Them Effectively

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Reviewed by
Devin Cabugcal
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 Mercedes-Benz CLS63 AMG S 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 Mercedes-Benz CLS63 AMG S 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.

How to Diagnose and Fix Oil Leaks in a Mercedes-Benz CLS63 AMG S?

When tackling oil leaks in your Mercedes-Benz CLS63 AMG S, a systematic diagnostic approach is essential for effective resolution. Begin with a thorough inspection of the engine compartment to locate the source of the leak, as this initial step is critical for determining the right repair strategy. Cleaning the engine is equally important, as it allows for a clearer view of the leak's origin, which is often due to worn seals or gaskets. Early detection of oil leaks can save you from costly engine damage, so be vigilant for any signs of leakage. Regular maintenance checks are vital; they help identify potential weak points before they develop into significant issues. Pay special attention to common leak areas such as the oil filter housing and valve covers, where improperly sized or worn o-rings frequently cause problems. Conducting a visual inspection underneath the vehicle for oil spots can also provide valuable clues. By following this structured approach, you can effectively diagnose and fix oil leaks, ensuring your CLS63 AMG S remains in optimal condition.

How to Diagnose and Fix Oil Leaks in a Mercedes-Benz CLS63 AMG S?

When tackling oil leaks in your Mercedes-Benz CLS63 AMG S, understanding common problems associated with the vehicle's engine and oil system is essential for effective diagnosis and repair. One prevalent issue is the deterioration of seals and gaskets, which can lead to leaks around critical areas such as the oil filter housing and valve covers. Additionally, the oil pan may develop cracks or loose bolts over time, contributing to oil seepage. It's also important to consider the possibility of a faulty oil cooler or a damaged oil line, which can result in significant leaks if not addressed promptly. Regularly checking these components during maintenance can help catch potential issues early, preventing more severe damage and costly repairs down the line. By being aware of these common failure modes, you can take a proactive approach to maintaining your CLS63 AMG S, ensuring its engine remains in peak condition and free from oil leaks.

Why is it Critical to Address Oil Leaks in a Mercedes-Benz CLS63 AMG S?

Addressing oil leaks in your Mercedes-Benz CLS63 AMG S is not just a matter of routine maintenance; it is a critical step in ensuring the safety and longevity of your vehicle. Ignoring the signs of an oil leak can lead to severe engine damage, which may result in costly repairs or even complete engine failure. The urgency of this issue cannot be overstated, as a compromised engine can not only affect performance but also pose significant safety risks while driving. Oil leaks can lead to inadequate lubrication, causing friction and overheating, which can ultimately result in catastrophic engine failure. By promptly diagnosing and repairing any oil leaks, you not only preserve the performance of your vehicle but also protect your investment and ensure a safe driving experience. Taking immediate action when you notice oil leaks is essential to prevent further damage and maintain the optimal functioning of your Mercedes-Benz CLS63 AMG S.

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