2021 Mercedes-Benz CLA250 Is Leaking Oil

Address Oil Leaks in Your 2021 Mercedes-Benz CLA250 Effectively

Find Repair Location
Reviewed by
Andrew Hajjar
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 2021 Mercedes-Benz CLA250 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 2021 Mercedes-Benz CLA250 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 steps to diagnose an oil leak in a 2021 Mercedes-Benz CLA250?

When diagnosing an oil leak in a 2021 Mercedes-Benz CLA250, start with a thorough visual inspection of the engine and the area beneath the vehicle. Look for any visible signs of oil, such as puddles or drips, particularly around the oil pan, valve cover gasket, oil filter, and oil drain plug. Next, check the oil levels to ensure they are adequate; low oil levels can indicate a leak and may lead to further engine issues if not addressed. Pay special attention to the oil filter and drain plug, as any looseness or damage here could be the source of the leak. If the leak remains elusive, consider adding UV dye to the engine oil, which can help illuminate the leak's origin when viewed under a UV light. For a more precise diagnosis, performing a pressure test on the oil system can reveal hidden leaks. If these steps do not yield results or if you feel uncertain about proceeding, consulting a qualified mechanic is advisable to ensure proper diagnosis and repair. By following these steps, you can effectively begin the process of identifying and addressing an oil leak in your vehicle.

What are the common causes of oil leaks in a 2021 Mercedes-Benz CLA250?

When dealing with oil leaks in a 2021 Mercedes-Benz CLA250, it's essential to understand the common culprits that may be at play. One frequent issue is a degraded or damaged oil pan gasket, which can deteriorate over time and lead to significant leaks. Additionally, a worn-out valve cover gasket can allow oil to escape from the top of the engine, creating visible leaks. Another potential source of oil leaks is a faulty oil filter housing gasket, which can compromise the seal and result in oil seepage. It's also important to check the oil cooler lines, as these can develop leaks due to wear and tear. Lastly, damaged oil seals, including camshaft and crankshaft seals, can contribute to oil leaks as they age. Addressing these issues promptly is crucial to maintaining your vehicle's performance and preventing further engine damage. Regular inspections and maintenance can help you catch these problems early, ensuring your CLA250 runs smoothly.

How urgent is it to address the oil leak in my 2021 Mercedes-Benz CLA250?

Addressing an oil leak in your 2021 Mercedes-Benz CLA250 is not just a matter of routine maintenance; it is a critical issue that requires immediate attention. Ignoring an oil leak can lead to severe engine damage, as the oil is essential for lubricating and cooling engine components. A lack of sufficient oil can cause overheating and increased friction, potentially resulting in catastrophic engine failure. Moreover, oil leaks can create hazardous driving conditions, as spilled oil on the road can lead to slippery surfaces, increasing the risk of accidents. The longer you wait to address the leak, the more likely it is that you will face escalating repair costs, as minor leaks can develop into major issues over time. Therefore, it is imperative to have your vehicle inspected by a qualified mechanic at the first sign of an oil leak to ensure your safety and the longevity of your vehicle.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.