2017 Mercedes-Benz CLS550 Is Leaking Oil

Address Oil Leaks in Your 2017 Mercedes-Benz CLS550 Effectively

Find Repair Location
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 2017 Mercedes-Benz CLS550 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 CLS550 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 CLS550?

To effectively diagnose an oil leak in your 2017 Mercedes-Benz CLS550, begin by visually inspecting the area beneath your vehicle for any signs of oil pooling or dripping, as this can provide immediate clues about the leak's location. Next, examine the engine components, focusing on the oil filter, oil pan, and valve cover gaskets, as these are common culprits for leaks. It's also essential to check the oil level; a significant drop may indicate a leak that needs addressing. For a more precise diagnosis, consider using UV dye in the engine oil, which can illuminate the leak's source under UV light. If the leak remains elusive, performing a pressure test on the oil system can help identify hidden leaks. Should these methods not yield results, consulting a qualified mechanic is advisable, as they can offer expert insights and solutions for your vehicle's oil leak issue. By following this structured approach, you can systematically identify and address the oil leak in your CLS550, ensuring your vehicle remains in optimal condition.

What are the common causes of oil leaks in a 2017 Mercedes-Benz CLS550?

When dealing with oil leaks in a 2017 Mercedes-Benz CLS550, it's essential to understand the common problems that can lead to this frustrating issue. One of the primary culprits is the oil pan gasket, which can degrade over time, resulting in leaks that may go unnoticed until they cause significant damage. Similarly, valve cover gaskets are prone to wear and can develop leaks, allowing oil to escape and potentially leading to engine performance issues. Another area to inspect is the oil filter housing gasket; if this component fails, it can create leaks in the engine compartment, making it crucial to check during routine maintenance. Additionally, the seals around the oil cooler can deteriorate, leading to seepage that may not be immediately visible. Lastly, the timing cover and its gasket are also common sources of oil leaks, and any issues here can compromise engine integrity. By being aware of these potential problems and addressing them promptly, DIY enthusiasts can maintain their vehicle's performance and longevity while preventing costly repairs down the line. Regular inspections and timely repairs are key to keeping your CLS550 in top shape.

How urgent is it to address the oil leak in my 2017 Mercedes-Benz CLS550?

Addressing an oil leak in your 2017 Mercedes-Benz CLS550 is not just a matter of routine maintenance; it is an urgent issue that requires immediate attention. Oil is vital for lubricating engine components, and a leak can lead to a significant loss of oil, which may result in severe engine damage and costly repairs down the line. Moreover, the safety implications cannot be overlooked; leaking oil can drip onto hot engine parts, creating a fire hazard that endangers both the vehicle and its occupants. By delaying repairs, you risk escalating the problem, leading to more extensive damage and higher repair costs. Therefore, it is crucial to act swiftly and resolve any oil leak to maintain the performance and safety of your vehicle.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.

2017 Mercedes-Benz CLS550 Oil Leak Causes & Repairs