2019 Mercedes-Benz GLC43 AMG Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2019 Mercedes-Benz GLC43 AMG 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 2019 Mercedes-Benz GLC43 AMG 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 2019 Mercedes-Benz GLC43 AMG 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 steps to diagnose an oil leak in a 2019 Mercedes-Benz GLC43 AMG?

To effectively diagnose an oil leak in your 2019 Mercedes-Benz GLC43 AMG, start with a thorough visual inspection of the vehicle. Look for any visible signs of oil under the car, particularly around the engine and oil pan, as these areas are common leak points. Next, regularly check your oil levels; a significant drop can indicate a leak that needs attention. Pay close attention to the oil filter and drain plug, ensuring they are secure and free from any oil residue. For a more precise diagnosis, consider adding UV dye to your engine oil. After running the engine, use a UV light to spot any leaks, as the dye will illuminate under the light. If the source remains elusive, performing a pressure test on the oil system can help identify hidden leaks. Additionally, inspect gaskets and seals for wear or damage, as these components are often culprits in oil leaks. If you still cannot locate the leak, it may be time to consult a qualified mechanic for a professional assessment. By following this structured approach, you can systematically identify and address any oil leak issues in your vehicle.

What are the common causes of oil leaks in a 2019 Mercedes-Benz GLC43 AMG?

When dealing with oil leaks in a 2019 Mercedes-Benz GLC43 AMG, 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 out over time, leading to noticeable oil spots under the vehicle. Another potential source of leaks is the valve cover gaskets, which can deteriorate and allow oil to seep out around the valve covers. Additionally, the oil filter housing gasket may fail, resulting in leaks around the oil filter area, while the seals surrounding the oil cooler can also degrade, causing oil to escape from this component. Lastly, the rear main seal, located at the back of the engine, is another area where leaks can develop as it ages. Addressing these leaks promptly is essential to prevent further engine damage and maintain optimal vehicle performance. Regular inspections and maintenance can help you catch these issues early, ensuring your GLC43 AMG remains in top condition.

How urgent is it to address the oil leak in my 2019 Mercedes-Benz GLC43 AMG?

Addressing an oil leak in your 2019 Mercedes-Benz GLC43 AMG is crucial and should not be delayed. Ignoring this issue can lead to severe engine damage due to inadequate lubrication, as low oil levels increase friction and heat within the engine components. This not only compromises the performance of your vehicle but also poses significant safety risks; oil can drip onto hot engine parts, creating a fire hazard. Furthermore, the environmental impact of leaking oil can be detrimental, as it may contaminate soil and water sources. Therefore, it is essential to act swiftly and have the leak inspected and repaired by a qualified mechanic to ensure your vehicle remains reliable, safe, and environmentally responsible.

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