2017 Mercedes-Benz GLC43 AMG Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2017 Mercedes-Benz GLC43 AMG 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 2017 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 2017 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 2017 Mercedes-Benz GLC43 AMG?

To effectively diagnose an oil leak in your 2017 Mercedes-Benz GLC43 AMG, begin with a thorough visual inspection of the engine and undercarriage. Look for any visible signs of oil, such as puddles or drips, particularly around the oil pan, valve cover gaskets, oil filter, and oil cooler. Next, check the oil levels in the engine; a significant drop may indicate a leak. Pay close attention to the oil filter and drain plug, ensuring they are secure and free from leaks. If the source remains elusive, consider conducting a pressure test on the oil system, which can help pinpoint the leak's location. For smaller, harder-to-detect leaks, adding UV dye to the engine oil can be beneficial, as it will illuminate under UV light, revealing the leak's origin. If these methods do not yield results or if you feel uncertain about the process, consulting a qualified mechanic or dealership is advisable for a professional assessment and repair. By following this diagnostic approach, you can systematically identify and address any oil leak issues in your vehicle.

What are the common causes of oil leaks in a 2017 Mercedes-Benz GLC43 AMG?

When dealing with oil leaks in a 2017 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 common source of leaks is the valve cover gasket, 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 leak in that vicinity. Lastly, the rear main seal is another potential leak point, as it can develop issues over time, leading to oil escaping from the rear of the engine. Addressing these leaks promptly is essential to prevent further engine damage and maintain the vehicle's performance, making regular inspections and maintenance vital for any DIY enthusiast looking to keep their GLC43 AMG in top shape.

How urgent is it to address the oil leak in my 2017 Mercedes-Benz GLC43 AMG?

Addressing an oil leak in your 2017 Mercedes-Benz GLC43 AMG is not just a matter of routine maintenance; it is a critical step in safeguarding your vehicle's performance and safety. Ignoring an oil leak can lead to severe engine damage, as oil is vital for lubrication and cooling. Without adequate oil levels, your engine may overheat or suffer from increased friction, resulting in costly repairs that could have been avoided. Additionally, oil leaks can create hazardous driving conditions, as spilled oil on the road can lead to slippery surfaces, posing a risk to both you and other drivers. By taking immediate action to fix the leak, you not only protect your investment but also ensure that your vehicle operates smoothly and safely. The sooner you address the issue, the more cost-effective it will be, preventing the need for extensive repairs down the line. Therefore, if you notice any signs of an oil leak, it is imperative to act quickly to maintain the integrity and longevity of your Mercedes-Benz.

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