2019 Mercedes-Benz GLC350e Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2019 Mercedes-Benz GLC350e 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 GLC350e 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 GLC350e 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 first steps to diagnose the oil leak in a 2019 Mercedes-Benz GLC350e?

When diagnosing an oil leak in a 2019 Mercedes-Benz GLC350e, it's essential to adopt a systematic approach that begins with simple visual inspections before moving on to more complex diagnostics. Start by thoroughly examining the engine and undercarriage for any visible signs of oil, such as drips or pools, which can help you pinpoint the leak's origin. Next, check the oil level to determine if it has dropped below the normal range, indicating a potential leak. Pay close attention to the gaskets and seals, as wear or damage in these areas is a common cause of oil leaks. Additionally, inspect the oil filter for any signs of leakage or damage that could exacerbate the problem. If the source remains elusive, consider performing a pressure test on the oil system, which can help identify the leak's exact location. Should these steps not yield results, consulting a qualified mechanic is advisable to ensure a thorough diagnosis and effective repair. By following this structured diagnostic approach, you can effectively address the oil leak issue in your vehicle.

What are the common causes of oil leaks in a 2019 Mercedes-Benz GLC350e?

When diagnosing oil leaks in a 2019 Mercedes-Benz GLC350e, it's crucial to understand the common problems that can arise. One frequent culprit is the oil pan gasket, which can degrade over time due to exposure to heat and engine vibrations, leading to leaks. Similarly, a faulty valve cover gasket can allow oil to escape from the engine compartment, often resulting in noticeable oil spots on the ground. Another area to inspect is the oil filter housing gasket, which can wear out and cause oil to seep from the filter area. Additionally, the oil cooler lines are susceptible to leaks as they age, potentially leading to oil loss. Lastly, various oil seals, including those around the crankshaft and camshaft, can deteriorate, contributing to leaks. Addressing these issues promptly is essential to maintain the vehicle's performance and prevent further engine damage, making regular inspections and maintenance a vital part of vehicle care for GLC350e owners.

How urgent is it to address the oil leak in my 2019 Mercedes-Benz GLC350e?

Addressing an oil leak in your 2019 Mercedes-Benz GLC350e is not just a matter of routine maintenance; it is a pressing concern that requires immediate attention. Ignoring an oil leak can lead to a significant drop in oil levels, which compromises the lubrication of essential engine components, increasing the risk of severe engine damage over time. Moreover, a leaking oil system can cause the engine to overheat, potentially resulting in costly repairs or even catastrophic engine failure. The safety implications are equally alarming, as oil dripping onto hot engine parts can create a fire hazard, putting both the vehicle and its occupants at risk. By promptly addressing the oil leak, you not only safeguard your engine's performance and longevity but also ensure a safer driving experience. Therefore, it is crucial to take action without delay to prevent further complications and maintain the overall health of your Mercedes-Benz GLC350e.

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