2019 Mercedes-Benz GLS63 AMG Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2019 Mercedes-Benz GLS63 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 2019 Mercedes-Benz GLS63 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 GLS63 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 steps should I take to diagnose the oil leak in my 2019 Mercedes-Benz GLS63 AMG?

To effectively diagnose an oil leak in your 2019 Mercedes-Benz GLS63 AMG, start by thoroughly inspecting the engine bay and the area beneath your vehicle for any visible signs of oil. Look for oil spots or puddles that may indicate the leak's location. Next, check the oil level using the dipstick; a significant drop could suggest a leak. Focus on the gaskets and seals around critical components such as the engine, oil filter, and oil pan, as these are common culprits for leaks. Don’t forget to examine the oil filter itself for any signs of damage or looseness, and ensure the oil drain plug is secure and not leaking. Inspect all oil hoses and lines for cracks or loose connections, as these can also lead to leaks. For a more thorough investigation, consider adding UV dye to the engine oil and running the engine; this will help you pinpoint the leak when using a UV light. If these steps do not reveal the source of the leak, it may be time to consult a qualified mechanic for a professional assessment. By following this diagnostic approach, you can systematically identify and address the issue, ensuring your vehicle remains in optimal condition.

What are the common causes of oil leaks in a 2019 Mercedes-Benz GLS63 AMG?

When diagnosing oil leaks in a 2019 Mercedes-Benz GLS63 AMG, it's essential to understand the common culprits that may be at play. One of the primary sources of leaks is the oil pan gasket, which can degrade over time due to exposure to heat and engine vibrations, leading to oil seepage. Additionally, worn valve cover gaskets are frequent offenders; if you notice oil pooling around the engine's top, this could indicate a failure in these gaskets. Another area to inspect is the oil filter housing gasket, as a faulty seal here can result in noticeable leaks. Don't overlook the oil cooler seals, which are crucial for maintaining oil circulation; leaks in this area can also contribute to oil loss. Lastly, ensure that the oil drain plug is secure and undamaged, as a loose or stripped plug can lead to significant oil leaks. By regularly checking these components and addressing any signs of wear or damage, you can effectively manage and prevent oil leaks, ensuring your GLS63 AMG remains in optimal condition.

How urgent is it to address the oil leak in my 2019 Mercedes-Benz GLS63 AMG?

When dealing with an oil leak in your 2019 Mercedes-Benz GLS63 AMG, understanding the urgency of the situation is crucial for both your vehicle's performance and your safety. A minor leak might seem manageable, but even small issues can escalate quickly, leading to significant oil loss and potential engine damage if left unattended. The lubrication of engine components is vital; a decrease in oil levels can increase friction, resulting in wear and tear that could lead to costly repairs down the line. Moreover, oil leaks pose safety risks, as they can create slippery surfaces on the road and increase the likelihood of accidents. Additionally, if oil drips onto hot engine parts, it could ignite, posing a fire hazard. Ignoring these symptoms can have long-term repercussions on your vehicle's health, making it essential to address any leaks promptly. For DIY enthusiasts, taking immediate action not only helps maintain the performance of your GLS63 AMG but also ensures a safer driving experience.

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2019 Mercedes-Benz GLS63 AMG Oil Leak Causes & Solutions