2015 Mercedes-Benz S65 AMG Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2015 Mercedes-Benz S65 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 2015 Mercedes-Benz S65 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 2015 Mercedes-Benz S65 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.

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 steps should I take to diagnose the oil leak in my 2015 Mercedes-Benz S65 AMG?

To effectively diagnose an oil leak in your 2015 Mercedes-Benz S65 AMG, start by thoroughly inspecting the engine bay and the area beneath your vehicle for any visible signs of oil, such as spots or puddles. This initial step can often reveal the leak's location. Next, check the oil level using the dipstick; a significant drop may indicate a leak that needs immediate attention. Focus on examining the gaskets and seals, particularly around the valve cover, oil pan, and oil filter housing, as these are common culprits for oil leaks. Additionally, inspect all oil hoses and lines for any cracks or loose connections that could contribute to the problem. If the source remains elusive, consider adding UV dye to the oil, which can help illuminate the leak under UV light. For a more precise diagnosis, a pressure test can be beneficial in pinpointing the leak's exact location. If these steps do not yield results or if the situation appears complex, it is wise to consult a qualified mechanic for a professional assessment and repair. By following this structured approach, you can efficiently identify and address the oil leak in your vehicle.

What are the common causes of oil leaks in a 2015 Mercedes-Benz S65 AMG?

When dealing with oil leaks in a 2015 Mercedes-Benz S65 AMG, 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 that may go unnoticed. Lastly, the rear main seal is another critical point of concern, as wear and tear can lead to significant oil loss from the back of the engine. Addressing these issues promptly is essential not only for maintaining the vehicle's performance but also for preventing further damage to the engine. Regular inspections and maintenance can help DIY enthusiasts catch these problems early, ensuring a smoother and more reliable driving experience.

How urgent is it to address the oil leak in a 2015 Mercedes-Benz S65 AMG, and what are the potential risks of delaying repairs?

Addressing an oil leak in your 2015 Mercedes-Benz S65 AMG is not just a matter of routine maintenance; it is a critical issue that demands immediate attention. An oil leak can lead to a significant loss of engine oil, which is vital for lubricating moving parts and ensuring the engine operates smoothly. If left unchecked, this can result in decreased engine performance and efficiency, ultimately risking severe engine damage or even complete failure. Moreover, the presence of leaking oil poses a serious fire hazard, especially if it comes into contact with hot engine components. Beyond safety concerns, neglecting an oil leak can have environmental repercussions, as spilled oil can contaminate soil and water sources. Therefore, it is essential to prioritize repairs to safeguard your vehicle's performance, your safety, and the environment.

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2015 Mercedes-Benz S65 AMG Oil Leak Causes & Repairs