2018 Mercedes-Benz SLC43 AMG Is Leaking Oil

Address Oil Leaks in Your 2018 Mercedes-Benz SLC43 AMG Effectively

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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 2018 Mercedes-Benz SLC43 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 2018 Mercedes-Benz SLC43 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 steps to diagnose the oil leak in a 2018 Mercedes-Benz SLC43 AMG?

To effectively diagnose an oil leak in a 2018 Mercedes-Benz SLC43 AMG, start with a thorough visual inspection of both the engine and the area beneath the vehicle. This initial step helps identify any obvious signs of oil pooling or dripping, which can lead you to the source of the leak. Next, check the oil levels to assess if there has been a significant loss, indicating a potential leak. Pay close attention to the oil filter and drain plug, as these components are common culprits; ensure they are secure and free from leaks. Additionally, inspect the gaskets and seals around the oil pan, valve cover, and oil filter housing for any signs of wear or damage. 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 for a comprehensive evaluation and repair. By following this structured approach, you can systematically identify and address the oil leak issue in your vehicle.

What are the common causes of oil leaks in a 2018 Mercedes-Benz SLC43 AMG?

When diagnosing oil leaks in a 2018 Mercedes-Benz SLC43 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 around the oil filter, which is often a messy and noticeable problem. Additionally, the seals surrounding the oil cooler can degrade, causing oil to leak in that area. Lastly, the rear main seal is another critical point of concern, as wear and tear can lead to significant oil leaks from the back of the engine. Addressing these issues promptly is essential to maintain the vehicle's performance and prevent further engine damage, making regular inspections and maintenance vital for any DIY enthusiast.

How urgent is it to address the oil leak in my 2018 Mercedes-Benz SLC43 AMG?

When it comes to an oil leak in your 2018 Mercedes-Benz SLC43 AMG, the urgency of addressing the problem cannot be overstated. Ignoring an oil leak can lead to a cascade of issues, starting with the risk of inadequate lubrication for your engine components. This lack of lubrication can cause increased friction and heat, ultimately resulting in severe engine damage that could require costly repairs. Furthermore, maintaining optimal oil levels is crucial for your vehicle's performance; a leak can compromise efficiency and responsiveness, affecting your driving experience. Safety is another critical factor; oil that drips onto hot engine parts poses a fire hazard, making it essential to act quickly. Lastly, delaying repairs can escalate the situation, leading to more extensive damage and higher repair costs down the line. Therefore, it is vital to have any oil leak inspected and repaired by a qualified mechanic as soon as possible to ensure the safety, performance, and longevity of your Mercedes-Benz SLC43 AMG.

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