2020 Mercedes-Benz C43 AMG Is Leaking Oil

Troubleshooting Oil Leaks in Your 2020 Mercedes-Benz C43 AMG: Causes and Repair Solutions

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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 2020 Mercedes-Benz C43 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.

What are the best Mercedes-Benz repair shops?

RepairPal Certified shops can diagnose and repair your 2020 Mercedes-Benz C43 AMG engine and performance issues. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
27 Certified Locations
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Tuffy Tire & Auto Service Center - Grandview

4.7
(85)
2.39 mi
1524 W 5th Ave
Columbus, OH
Open
Closes 5:00 PM
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Excite Auto Repair & Towing

4.4
(15)
5.94 mi
3430 Westerville Road
Columbus, OH
Open
Closes 6:00 PM
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All In Auto Service

4.9
(25)
6.56 mi
5200 Fisher Road
Columbus, OH
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Closes 6:00 PM
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Tuffy Tire & Auto Service - Grove City

4.4
(520)
6.67 mi
2131 Stringtown Rd
Grove City, OH
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Closes 6:00 PM
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How much does it cost to fix a 2020 Mercedes-Benz C43 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 potential causes of an oil leak in a 2020 Mercedes-Benz C43 AMG, and how should I diagnose it?

When diagnosing an oil leak in your 2020 Mercedes-Benz C43 AMG, it's essential to adopt a methodical approach that prioritizes straightforward solutions. Begin with a thorough visual inspection of the engine bay and the area beneath the vehicle to identify any obvious signs of oil accumulation. Pay close attention to the gaskets and seals, as these components are often the culprits behind leaks; look for cracks or wear that could indicate a failure. Next, check the oil levels regularly to determine if there is a significant drop, which can signal a leak. Ensure that the oil filter is securely fastened and that the oil drain plug is tight, as these are common sources of oil seepage. If no issues are apparent from these initial checks, consider conducting a pressure test to help pinpoint the leak's source more accurately. This step-by-step diagnostic approach not only simplifies the process but also empowers you to tackle the issue effectively, potentially saving you time and money on repairs. If you find yourself uncertain at any stage, consulting a professional mechanic can provide additional insights and ensure that the problem is resolved correctly.

What are the common causes of oil leaks in a 2020 Mercedes-Benz C43 AMG?

When dealing with oil leaks in a 2020 Mercedes-Benz C43 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 and lead to leaks. Additionally, valve cover gaskets are known to deteriorate, resulting in oil seeping from the top of the engine. Another area to inspect is the oil filter housing gasket; if this component fails, it can cause oil to leak around the oil filter. Furthermore, the seals surrounding the oil cooler can also degrade, leading to leaks from this part. Lastly, issues with the timing cover can contribute to oil leaks as well. Addressing these problems promptly is vital to prevent engine damage and maintain optimal vehicle performance. Regular inspections and maintenance can help DIY enthusiasts catch these issues early, ensuring a smoother driving experience.

How urgent is it to address the oil leak in my 2020 Mercedes-Benz C43 AMG?

Addressing an oil leak in your 2020 Mercedes-Benz C43 AMG is not just a matter of routine maintenance; it is a pressing issue that requires immediate attention. Oil is vital for lubricating engine components, and a leak can lead to a significant loss of oil, jeopardizing the engine's performance and longevity. Ignoring this problem can result in severe engine damage, costly repairs, and even unexpected breakdowns. Moreover, the safety implications cannot be overlooked; leaking oil can drip onto hot engine parts, creating a fire hazard that endangers both the vehicle and its occupants. By tackling the oil leak promptly, you not only safeguard your engine from further damage but also enhance the overall safety of your vehicle. Therefore, if you notice any signs of an oil leak, it is crucial to act swiftly to maintain the performance and safety of your Mercedes-Benz C43 AMG.

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