2014 Mercedes-Benz CLS63 AMG S Is Leaking Oil

Address Oil Leaks in 2014 Mercedes-Benz CLS63 AMG S Effectively

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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 CLS63 AMG S 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 S 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 steps to diagnose the oil leak in a 2014 Mercedes-Benz CLS63 AMG S?

When diagnosing an oil leak in a 2014 Mercedes-Benz CLS63 AMG S, it's essential to adopt a systematic diagnostic approach that begins with the simplest methods before progressing to more complex solutions. Start with a thorough visual inspection of the engine and undercarriage to identify any obvious signs of oil pooling or dripping. This initial step can often reveal the source of the leak without further intervention. Next, check the oil levels to determine if there has been a significant loss, which may indicate a leak. Pay close attention to the oil filter and drain plug, as these components are common culprits for leaks; ensure they are secure and free from damage. Additionally, inspect the gaskets and seals around the oil pan, valve cover, and oil filter housing for any signs of wear or deterioration. If the leak remains elusive, consider performing a pressure test on the oil system to uncover hidden leaks. For a more precise diagnosis, adding UV dye to the engine oil can help pinpoint the leak's location when illuminated with a UV light. If these steps do not yield results, consulting a qualified mechanic is advisable to ensure a thorough and accurate diagnosis. By following this structured approach, you can effectively identify and address oil leaks in your vehicle.

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

When dealing with oil leaks in a 2014 Mercedes-Benz CLS63 AMG S, it's crucial to understand the common culprits that may be at play. One frequent issue is the degradation of valve cover gaskets, which can lead to oil seeping around the valve covers over time. Another common source of leaks is the oil pan gasket, which may wear out or sustain damage, resulting in oil leaking from the engine's bottom. Additionally, the oil filter housing gasket can deteriorate, causing leaks in the vicinity of the oil filter. It's also important to consider the rear main seal, located at the back of the engine, as it can develop leaks that allow oil to drip onto the ground. Lastly, the seals around the camshafts and crankshaft are susceptible to wear, potentially leading to oil leaks within the engine compartment. Addressing these issues promptly is essential to prevent further engine damage, and regular maintenance checks can help catch these leaks early, ensuring your vehicle remains in optimal condition.

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

Addressing an oil leak in your 2014 Mercedes-Benz CLS63 AMG S is not just a matter of routine maintenance; it is an urgent concern that requires immediate attention. An oil leak can lead to a significant loss of engine oil, which is vital for lubricating moving parts and preventing overheating. If the oil level drops too low, it can result in severe engine damage, potentially leading to costly repairs or even complete engine failure. Moreover, oil leaks create hazardous driving conditions, as spilled oil can make roads slippery, increasing the risk of accidents. From an environmental perspective, neglecting an oil leak can lead to soil and water contamination, posing a threat to local ecosystems. Financially, the longer you wait to address the leak, the more you may end up spending on repairs due to additional damage and increased fuel consumption. Therefore, it is crucial to have the leak inspected and repaired by a qualified mechanic as soon as possible to ensure the safety, performance, and longevity of your vehicle.

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