2014 Mercedes-Benz CLS63 AMG Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2014 Mercedes-Benz CLS63 AMG 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 2014 Mercedes-Benz CLS63 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 CLS63 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 CLS63 AMG?

When tackling an oil leak in a 2014 Mercedes-Benz CLS63 AMG, start with a thorough visual inspection of the engine bay and undercarriage to spot any obvious signs of oil accumulation or drips. This initial step can often reveal the leak's location. Next, check the oil levels to determine if there has been a significant drop, which may indicate a leak. Pay close attention to the oil filter and drain plug, as these components can sometimes be loose or damaged, leading to leaks. Additionally, inspect the gaskets and seals around the oil pan, valve cover, and oil filter housing, as these are common culprits for oil leaks. 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; running the engine and using a UV light will help you identify the exact source of the leak. By following these diagnostic steps, you can effectively narrow down the cause of the oil leak and take appropriate action to resolve it.

What are the common causes of oil leaks in a 2014 Mercedes-Benz CLS63 AMG?

When diagnosing oil leaks in a 2014 Mercedes-Benz CLS63 AMG, it's crucial to understand the common problems that can arise. One of the primary culprits is the degradation of gaskets and seals, which can wear out over time, leading to leaks. Additionally, a loose or damaged oil drain plug can create seepage from the oil pan, while a faulty oil filter may leak if not installed correctly or if it is defective. Cracks or holes in the oil pan can also result in significant oil loss, and valve cover gasket leaks are another frequent issue, often caused by the natural wear and tear of the gaskets. Addressing these problems promptly is vital to prevent further engine damage and maintain the vehicle's performance. Regular inspections and maintenance can help catch these issues early, ensuring your CLS63 AMG remains in optimal condition.

How urgent is it to address the oil leak in a 2014 Mercedes-Benz CLS63 AMG?

Addressing an oil leak in your 2014 Mercedes-Benz CLS63 AMG is not just a matter of routine maintenance; it is a critical issue that demands immediate attention. Ignoring an oil leak can lead to severe engine damage due to insufficient lubrication, which may result in costly repairs or even engine failure. Additionally, oil leaks pose safety hazards, as they can create slippery surfaces that increase the risk of accidents, both for you and other drivers on the road. The environmental impact is also significant, as leaked oil can contaminate soil and water sources, contributing to pollution. Furthermore, neglecting an oil leak can lead to increased oil consumption and potential overheating of the engine, further exacerbating the problem. Therefore, it is essential to address any signs of an oil leak promptly to ensure the safety, performance, and longevity of your vehicle.

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