2014 Mercedes-Benz ML63 AMG Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2014 Mercedes-Benz ML63 AMG and How to Address Them

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Reviewed by
Aisha
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 ML63 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 2014 Mercedes-Benz ML63 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 are the initial diagnostic steps to identify the source of the oil leak in a 2014 Mercedes-Benz ML63 AMG?

To effectively identify the source of an oil leak in a 2014 Mercedes-Benz ML63 AMG, start with a thorough visual inspection of both the engine bay and the area beneath the vehicle. Look for any visible signs of oil, such as puddles or stains, which can provide immediate clues. Next, check the oil levels to determine if there has been a significant loss, as this can indicate a leak. Pay special attention to the oil filter and drain plug, as these components are common culprits for leaks; ensure they are secure and free from oil residue. Additionally, inspect the gaskets and seals, particularly the valve cover and oil pan gaskets, since these areas are prone to wear and leakage. If the source remains elusive, consider performing a pressure test on the oil system to detect hidden leaks. For a more advanced method, adding UV dye to the engine oil can help pinpoint the leak's location when illuminated with a UV light. By following these diagnostic steps, you can systematically narrow down the potential sources of the oil leak and take the necessary actions to resolve the issue.

What are the common causes of oil leaks in a 2014 Mercedes-Benz ML63 AMG?

When dealing with oil leaks in a 2014 Mercedes-Benz ML63 AMG, it's crucial to understand the common culprits that may be at play. One of the primary sources of leaks is the valve cover gaskets, which can deteriorate over time, leading to noticeable oil seepage. Another frequent issue arises from the oil pan gasket, which may wear out or sustain damage, resulting in oil leaking from the engine's base. Additionally, the oil filter housing gasket can become faulty, causing leaks around the oil filter area, while the seals surrounding the oil cooler can also deteriorate, leading to external oil leaks. Lastly, a failing rear main seal can contribute to oil leaks at the rear of the engine. Addressing these leaks promptly is essential not only for maintaining the vehicle's performance but also for preventing potential engine damage. Regular inspections and maintenance can help you catch these issues early, ensuring your ML63 AMG remains in optimal condition.

How urgent is it to address the oil leak in my 2014 Mercedes-Benz ML63 AMG?

Addressing an oil leak in your 2014 Mercedes-Benz ML63 AMG is not just a matter of routine maintenance; it is a critical issue that requires immediate attention. Ignoring an oil leak can lead to severe engine damage due to inadequate lubrication, which may result in costly repairs or even engine failure. Additionally, the environmental impact of leaking oil cannot be overlooked, as it poses a risk to local ecosystems if it seeps into the ground or water sources. Safety is another paramount concern; oil on the road can create hazardous driving conditions, increasing the likelihood of accidents. Therefore, it is essential to assess the severity of the leak and take action promptly, whether that means tightening a loose connection, replacing a gasket, or consulting a professional mechanic. By addressing the leak quickly, you not only protect your vehicle's performance but also contribute to a safer and cleaner environment.

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