2022 Mercedes-Benz GLS450 Is Leaking Oil

Common Causes of Oil Leaks in Your 2022 Mercedes-Benz GLS450 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 2022 Mercedes-Benz GLS450 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 2022 Mercedes-Benz GLS450 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 steps to diagnose the oil leak in a 2022 Mercedes-Benz GLS450?

To effectively diagnose an oil leak in a 2022 Mercedes-Benz GLS450, begin with a thorough visual inspection of the engine and undercarriage, looking for any signs of oil accumulation or dripping. This initial step can often reveal the leak's source. Next, check the oil levels to determine if there has been a significant loss, which may indicate a leak. Pay close attention to the oil filter and drain plug, as these components can sometimes be the culprits; ensure they are secure and free from leaks. Additionally, inspect the gaskets and seals, particularly around the valve cover, oil pan, and camshaft, as wear or damage in these areas is common. If the leak remains elusive, consider performing a pressure test on the oil system, which can help identify leaks using air pressure and UV dye. Should these steps not yield results, consulting a qualified mechanic is advisable for a professional assessment. By following this diagnostic approach, you can systematically identify and address the oil leak issue in your vehicle.

What are the common causes of oil leaks in a 2022 Mercedes-Benz GLS450?

When dealing with oil leaks in a 2022 Mercedes-Benz GLS450, it's crucial to understand the common culprits that may be at play. One frequent issue is a degraded or damaged oil pan gasket, which can wear out over time and lead to significant leaks. Additionally, a faulty valve cover gasket is another common source of oil seepage, often resulting from wear and tear. It's also important to check the oil filter housing gasket, as a compromised seal here can allow oil to escape. Another potential problem area is the oil cooler seals; if these are cracked or damaged, they can lead to leaks from the cooler itself. Lastly, don't overlook the oil drain plug; if it's damaged or not properly tightened, it can also be a source of oil leakage. Addressing these issues promptly is essential to prevent engine damage and maintain the vehicle's performance, making regular inspections and maintenance key to keeping your GLS450 in top shape.

How urgent is it to address the oil leak in my 2022 Mercedes-Benz GLS450?

Addressing an oil leak in your 2022 Mercedes-Benz GLS450 is not just a matter of routine maintenance; it is a pressing concern that requires immediate attention. Oil leaks can significantly reduce oil levels, leading to inadequate lubrication of engine components, which may result in severe damage over time. Furthermore, neglecting an oil leak can cause the engine to overheat, potentially leading to costly repairs or even catastrophic engine failure. The safety implications are equally alarming, 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 protect yourself and others on the road. Therefore, it is crucial to take action as soon as you notice any signs of an oil leak to prevent further complications and ensure the optimal functioning of your Mercedes-Benz GLS450.

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