2016 Mercedes-Benz CLS400 Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2016 Mercedes-Benz CLS400 and How to Address Them

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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 CLS400 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 CLS400 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 potential causes of an oil leak in a 2016 Mercedes-Benz CLS400, and how should I diagnose it?

When diagnosing an oil leak in your 2016 Mercedes-Benz CLS400, it's essential to adopt a methodical diagnostic approach. Begin with a thorough visual inspection of the vehicle's undercarriage, looking for any visible signs of oil pooling or streaks that could indicate the source of the leak. Next, regularly monitor your oil levels; a significant drop can signal a leak that needs immediate attention. Pay close attention to the gaskets and seals, as these components are prone to wear over time and can often be the culprits behind leaks. Inspect the oil pan and the oil drain plug for any signs of damage or looseness, as these areas are common leak points. Additionally, ensure that the oil filter is correctly installed and functioning, as a faulty filter can also lead to oil escaping. Don't overlook the valve cover gasket, which can develop leaks, and check the oil cooler lines for any signs of wear or damage. By following this structured approach, you can effectively identify and address the source of the oil leak, ensuring your vehicle remains in optimal condition.

What are the common causes of oil leaks in a 2016 Mercedes-Benz CLS400?

When dealing with oil leaks in a 2016 Mercedes-Benz CLS400, 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 wear down over time, leading to leaks. Similarly, worn-out valve cover gaskets often become brittle and cracked, allowing oil to escape. Another potential source of leaks is the oil filter housing gasket; if this component is damaged, it can result in significant oil seepage. Additionally, oil cooler lines are susceptible to wear and tear, which can lead to leaks as well. Lastly, damaged oil seals, such as those found around the crankshaft or camshaft, can also contribute to oil leaks. Addressing these issues promptly is essential to maintain engine health and performance, making regular inspections and maintenance a vital part of vehicle care.

How urgent is it to address the oil leak in my 2016 Mercedes-Benz CLS400?

Addressing an oil leak in your 2016 Mercedes-Benz CLS400 is not just a matter of routine maintenance; it is a pressing concern that requires immediate attention. Ignoring an oil leak can lead to severe engine damage due to inadequate lubrication, as oil is vital for the smooth operation of engine components. Moreover, the presence of leaking oil poses a significant fire hazard, especially if it comes into contact with hot engine parts. Continuing to drive with a compromised oil level can result in overheating, which may lead to catastrophic engine failure and costly repairs. By prioritizing the repair of an oil leak, you not only safeguard your vehicle's performance but also protect yourself from potential safety risks and financial burdens in the future. Therefore, it is crucial to act swiftly to ensure the longevity and reliability of your Mercedes-Benz CLS400.

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