2021 Mercedes-Benz GLE450 Is Leaking Oil

Common Causes of Oil Leaks in Your 2021 Mercedes-Benz GLE450 and How to Address Them

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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 2021 Mercedes-Benz GLE450 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 2021 Mercedes-Benz GLE450 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.

An oil leak may be noted on the ground where the vehicle is parked. However, many vehicles have plastic trays underneath the engine that may catch leaking oil and conceal the leak. In such cases, a low oil level, a burning oil smell, or even smoke from oil burning in the engine bay may be noted.

»MORE: Signs of a bad oil pan gasket

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 initial diagnostic steps to identify the source of the oil leak in a 2021 Mercedes-Benz GLE450?

To effectively identify the source of an oil leak in your 2021 Mercedes-Benz GLE450, start with a thorough visual inspection of both the engine and the area beneath the vehicle. Look for any visible signs of oil, such as drips or pools, which can help you narrow down potential leak points. 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 can often be the culprits behind leaks. Ensure they are secure and free from any oil residue. Additionally, inspect the gaskets and seals within the engine, as wear and tear in these areas are common sources of leaks. If the leak remains elusive, consider performing a pressure test on the oil system to uncover hidden leaks. For a more advanced approach, adding UV dye to the engine oil can help you pinpoint the leak's location when illuminated with a UV light. By following these diagnostic steps, you can systematically identify and address the oil leak, ensuring your vehicle remains in optimal condition.

What are the common causes of oil leaks in a 2021 Mercedes-Benz GLE450?

Understanding the common causes of oil leaks in a 2021 Mercedes-Benz GLE450 is essential for any DIY enthusiast looking to maintain their vehicle. One of the primary culprits is degraded gaskets and seals, which can wear out over time due to the engine's heat and pressure, leading to leaks. Additionally, a loose or damaged oil drain plug can create a significant issue, as it may not hold the oil securely, resulting in leaks. Inspecting the oil pan for cracks or holes is also crucial, as any damage here can lead to oil escaping from the engine. Another area to check is the valve cover gasket; if it fails, it can allow oil to seep out, creating a mess and potential engine damage. Lastly, the oil filter housing gasket is another common source of leaks, and ensuring it is in good condition can prevent oil from leaking during operation. Regular inspections and prompt repairs of these components can help maintain the integrity of your engine and prevent costly repairs down the line.

How urgent is it to address the oil leak in my 2021 Mercedes-Benz GLE450?

Addressing an oil leak in your 2021 Mercedes-Benz GLE450 is not just a matter of routine maintenance; it is an urgent issue that requires immediate attention. Oil leaks can significantly reduce oil levels, leading to inadequate lubrication of engine components, which can cause severe damage over time. Moreover, neglecting this problem can result in engine overheating, potentially culminating in costly repairs or even complete engine failure. The safety implications are equally concerning, as leaking oil can drip onto hot engine parts, creating a fire hazard. By promptly addressing the oil leak, you not only safeguard your vehicle's performance and longevity but also ensure a safer driving experience. Therefore, it is crucial to act quickly to mitigate these risks and maintain the efficiency of your GLE450.

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