2017 Mercedes-Benz CLA250 Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2017 Mercedes-Benz CLA250 and How to Address Them

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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 2017 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 2017 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 potential causes of an oil leak in a 2017 Mercedes-Benz CLA250, and how should I diagnose it?

When diagnosing an oil leak in your 2017 Mercedes-Benz CLA250, it's essential to start with a systematic approach that prioritizes simpler solutions before delving into more complex issues. Begin with a thorough visual inspection under the vehicle to identify any obvious signs of oil pooling or dripping. Next, regularly check your oil levels; a significant drop can indicate a leak. Pay close attention to the gaskets and seals, as these components are prone to wear over time and can be a common source of leaks. Ensure that the oil drain plug is securely tightened, as a loose or damaged plug can lead to oil seepage. Additionally, inspect the oil filter for any signs of leakage, as a faulty filter can also contribute to the problem. Don't overlook the oil pan; cracks or damage here can be significant leak sources. Lastly, examine the oil cooler lines and the valve cover gasket for any signs of wear or leaks. By following this diagnostic approach, you can effectively pinpoint the cause of the oil leak and take the necessary steps to address it, ensuring your vehicle remains in optimal condition.

What are the common causes of oil leaks in a 2017 Mercedes-Benz CLA250?

When dealing with oil leaks in a 2017 Mercedes-Benz CLA250, 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 lead to oil seepage as it ages. Similarly, the valve cover gasket is another area where wear and tear can result in leaks, often noticeable from the top of the engine. Additionally, the oil filter housing gasket can fail, causing oil to leak around the oil filter, while the timing cover may also develop leaks due to damaged gaskets or seals. Lastly, issues with the oil cooler seals can contribute to oil leaks within the engine compartment. Addressing these leaks promptly is vital to prevent further engine damage and maintain optimal vehicle performance. Regular inspections and maintenance can help detect these problems early, allowing DIY enthusiasts to take action before they escalate.

How urgent is it to address the oil leak in my 2017 Mercedes-Benz CLA250?

Addressing an oil leak in your 2017 Mercedes-Benz CLA250 is not just a matter of routine maintenance; it is a pressing issue that requires immediate attention. Ignoring an oil leak can lead to a significant drop in oil levels, which compromises the lubrication of essential engine components, increasing the risk of severe damage over time. Additionally, a leaking oil system can cause the engine to overheat, potentially resulting in costly repairs or even catastrophic engine failure. Beyond mechanical concerns, oil leaks present safety hazards, as oil can drip onto hot engine parts, creating a fire risk. By regularly monitoring for leaks and addressing them promptly, you not only safeguard your vehicle's performance but also enhance its longevity. Therefore, it is crucial to act swiftly to resolve any oil leak issues in your CLA250 to ensure safe and reliable operation.

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2017 Mercedes-Benz CLA250 Oil Leak Issues & Repairs