2017 Mercedes-Benz CLS400 Is Leaking Oil

Address Oil Leaks in Your 2017 Mercedes-Benz CLS400 Effectively

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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 2017 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 2017 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.

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 the oil leak in a 2017 Mercedes-Benz CLS400?

To effectively identify the source of an oil leak in a 2017 Mercedes-Benz CLS400, start with a thorough visual inspection of both the engine and the area beneath the vehicle. Look for any visible signs of oil accumulation or dripping, as these can provide immediate clues. Next, check the oil levels in the engine; a significant drop may indicate a leak that needs addressing. Pay special attention to the oil filter and drain plug, as these components are common culprits for leaks—ensure they are secure and free from oil residue. Additionally, examine the gaskets and seals, particularly around the valve cover and oil pan, for any signs of wear or damage. If the leak remains elusive, consider adding UV dye to the engine oil, which can help illuminate the leak's origin under UV light. Finally, conducting a pressure test on the oil system can provide a more precise identification of any leaks. By following these steps, you can systematically diagnose the issue and take the necessary actions to resolve the oil leak effectively.

What are the common causes of oil leaks in a 2017 Mercedes-Benz CLS400?

When dealing with oil leaks in a 2017 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. Additionally, worn valve cover gaskets are another common source of oil leakage, often manifesting as oil seeping from the top of the engine. It's also important to check the oil filter housing gasket, as a faulty seal in this area can result in oil escaping around the oil filter. Furthermore, leaking oil cooler lines can contribute to oil loss, creating a mess beneath the vehicle. Lastly, various oil seals, including those around the crankshaft and camshaft, can deteriorate and lead to leaks. Addressing these issues promptly is essential not only for maintaining the vehicle's performance but also for preventing potential engine damage. Regular inspections and maintenance can help DIY enthusiasts catch these problems early, ensuring a smoother and more reliable driving experience.

How urgent is it to address the oil leak in my 2017 Mercedes-Benz CLS400?

When dealing with an oil leak in your 2017 Mercedes-Benz CLS400, understanding the urgency of the situation is crucial for both your vehicle's health and your safety. If the leak is minor, you might feel tempted to postpone repairs, but even small leaks can escalate quickly, leading to significant engine damage if left unaddressed. Oil is vital for lubricating engine components, and a persistent leak can result in inadequate lubrication, causing overheating and potentially catastrophic engine failure. Moreover, oil leaks pose environmental risks, as spilled oil can contaminate soil and water sources, making prompt action essential. Additionally, consider the safety implications; oil on driveways or parking areas can create hazardous conditions, increasing the risk of slips and falls. Therefore, regardless of the leak's initial severity, it is advisable to address the issue as soon as possible to protect your vehicle, the environment, and your safety.

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2017 Mercedes-Benz CLS400 Oil Leak Causes & Repairs