2018 Mercedes-Benz E43 AMG Is Leaking Oil

Address Oil Leaks in Your 2018 Mercedes-Benz E43 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 E43 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 E43 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 E43 AMG?

To effectively diagnose an oil leak in your 2018 Mercedes-Benz E43 AMG, begin with a thorough visual inspection of the engine and undercarriage, looking for any signs of oil accumulation 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 can sometimes be the culprits; ensure they are secure and free from leaks. Additionally, inspect the gaskets and seals for any signs of wear or damage, as these are common areas where leaks can occur. If the source remains elusive, consider performing a pressure test on the oil system to identify hidden leaks. For a more precise diagnosis, adding UV dye to the engine oil can help illuminate the leak under UV light. If these methods do not yield results, or if the situation appears complex, consulting a qualified mechanic is advisable to ensure a thorough and accurate diagnosis. 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 E43 AMG?

When diagnosing oil leaks in a 2018 Mercedes-Benz E43 AMG, it's essential to understand the common culprits that may be at play. One frequent issue is the degradation of the oil pan gasket, which can wear down over time, leading to leaks at the bottom of the engine. Additionally, valve cover gaskets are prone to wear and can allow oil to escape from the top of the engine, creating visible leaks. Another area to inspect is the oil filter housing gasket; if this component fails, it can result in oil leaking around the oil filter, which is often a messy situation. Furthermore, oil cooler seals can also develop leaks, causing oil to seep out and potentially leading to low oil levels. Lastly, the timing cover is another critical area where leaks can occur, often due to wear or improper installation. By being aware of these common issues, DIYers can take proactive steps to inspect and maintain their vehicle, ensuring that any signs of oil leakage are addressed promptly to avoid further damage.

How urgent is it to address an oil leak in a 2018 Mercedes-Benz E43 AMG?

Addressing an oil leak in a 2018 Mercedes-Benz E43 AMG is not just a matter of routine maintenance; it is a crucial step in safeguarding the vehicle's performance and longevity. Ignoring an oil leak can lead to severe engine damage, as the oil is vital for lubrication and cooling. Without adequate oil levels, the engine may overheat or suffer from increased friction, resulting in costly repairs. Moreover, an oil leak poses safety risks, as spilled oil can create hazardous driving conditions, increasing the likelihood of accidents. By taking immediate action to fix the leak, you not only protect your investment but also ensure a safer driving experience. Additionally, addressing the issue early can save you money in the long run, as minor repairs are typically less expensive than the extensive damage that can occur if the leak is left unattended. Therefore, for DIY enthusiasts, it is essential to prioritize the repair of an oil leak to maintain the vehicle's optimal performance and safety.

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2018 Mercedes-Benz E43 AMG Oil Leak Causes & Repairs