2014 Mercedes-Benz GL550 Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2014 Mercedes-Benz GL550 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 2014 Mercedes-Benz GL550 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 2014 Mercedes-Benz GL550 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 initial diagnostic steps to identify the source of the oil leak in a 2014 Mercedes-Benz GL550?

To effectively identify the source of an oil leak in your 2014 Mercedes-Benz GL550, start with a thorough visual inspection of both the engine and the area beneath the vehicle. Look for any visible signs of oil accumulation or dripping, as these can provide immediate clues. Next, check the oil levels to assess whether there has been a significant loss, which may indicate a leak. Pay special attention to the oil filter and drain plug, ensuring they are secure and free from leaks. Inspecting gaskets and seals is also crucial; common culprits include the valve cover gasket and oil pan gasket, which can wear over time. If the source remains elusive, consider performing a pressure test on the oil system to help pinpoint the leak's location. For a more advanced approach, adding UV dye to the engine oil can be beneficial; after running the engine, use a UV light to reveal the leak's source, as the dye will glow under the light. By following these diagnostic steps, you can systematically narrow down the cause of the oil leak and take the necessary actions to resolve it.

What are the common causes of oil leaks in a 2014 Mercedes-Benz GL550?

When dealing with oil leaks in a 2014 Mercedes-Benz GL550, 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 leaks. Similarly, valve cover gaskets are prone to deterioration, and their failure can result in oil escaping from the engine. Another area to inspect is the oil filter housing gasket; if this component fails, it can create leaks within the engine compartment. Additionally, the seals around the oil cooler can degrade, contributing to oil leaks, while problems with the timing cover can also lead to oil escaping from the engine. Addressing these leaks promptly is vital to prevent further engine damage and maintain the vehicle's performance. Regular inspections and maintenance can help DIY enthusiasts catch these issues early, ensuring a smoother and more reliable driving experience.

How urgent is it to address the oil leak in a 2014 Mercedes-Benz GL550?

Addressing an oil leak in your 2014 Mercedes-Benz GL550 is not just a matter of routine maintenance; it is a pressing issue that requires immediate attention. Ignoring an oil leak can lead to severe engine damage due to insufficient lubrication, which is vital for the smooth operation of your vehicle. Additionally, the presence of leaking oil creates a significant fire hazard, especially if it comes into contact with hot engine components. The longer you drive with an oil leak, the more extensive the damage can become, potentially resulting in costly repairs that could have been avoided with prompt action. By addressing the leak as soon as possible, you not only safeguard the performance and longevity of your vehicle but also ensure your safety on the road. Therefore, if you notice any signs of an oil leak, it is crucial to take action immediately to prevent further complications.

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2014 Mercedes-Benz GL550 Oil Leak Causes & Repair Costs