2022 Mercedes-Benz CLA45 AMG Is Leaking Oil

Address Oil Leaks in Your 2022 Mercedes-Benz CLA45 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 2022 Mercedes-Benz CLA45 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 2022 Mercedes-Benz CLA45 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.

An oil leak may be noted on the ground where the vehicle is parked. However, many vehicles have plastic trays underneath the engine that may catch leaking oil and conceal the leak. In such cases, a low oil level, a burning oil smell, or even smoke from oil burning in the engine bay may be noted.

»MORE: Signs of a bad oil pan gasket

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 first steps to diagnose an oil leak in a 2022 Mercedes-Benz CLA45 AMG?

To effectively diagnose an oil leak in your 2022 Mercedes-Benz CLA45 AMG, begin with a thorough visual inspection of the engine and undercarriage. Look for any obvious signs of oil, such as puddles or drips, which can help you narrow down the potential source. Next, check the oil levels to determine if there has been a significant loss, indicating a leak. Pay special attention to the oil filter and drain plug, as these components are often prone to leaks; ensure they are secure and free from oil residue. Additionally, inspect the gaskets and seals, particularly the valve cover gasket and oil pan gasket, as these are common culprits for oil leaks. If the source remains elusive, consider conducting a pressure test on the oil system to uncover hidden leaks. For a more precise diagnosis, adding UV dye to the engine oil can illuminate the leak's origin under UV light. If you find the process overwhelming or the leak persists, consulting a qualified mechanic is advisable to ensure a thorough inspection and repair. By following these steps, you can confidently approach the diagnosis of an oil leak in your vehicle.

What are the common causes of oil leaks in a 2022 Mercedes-Benz CLA45 AMG?

When diagnosing oil leaks in a 2022 Mercedes-Benz CLA45 AMG, it's crucial to consider several common culprits that may be at play. One of the primary issues is a degraded or damaged oil pan gasket, which can wear out over time, leading to leaks. Additionally, a faulty valve cover gasket can also be a significant source of oil leakage, as it seals the engine's upper section and can deteriorate with age. Another potential problem area is the oil filter housing gasket; if this component becomes worn, it can allow oil to escape from the engine. Furthermore, various seals within the engine, such as camshaft and crankshaft seals, may also wear out, contributing to leaks. Lastly, don't overlook the oil drain plug; if it is loose or damaged, it can lead to oil loss as well. 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 2022 Mercedes-Benz CLA45 AMG?

Addressing an oil leak in your 2022 Mercedes-Benz CLA45 AMG is of utmost urgency due to the serious implications it can have on your vehicle's performance and safety. An oil leak can lead to a significant loss of lubrication, which is essential for the smooth operation of your engine. Without adequate lubrication, critical components may overheat, leading to severe engine damage that could result in costly repairs. Moreover, neglecting an oil leak not only risks engine failure but can also create hazardous driving conditions, as spilled oil on the road can make it slippery, endangering both you and other motorists. Timely intervention is crucial to maintain the efficiency and performance of your vehicle, ensuring that it operates at its best. Therefore, if you notice any signs of an oil leak, it is highly advisable to diagnose and address the issue promptly, either through DIY methods or by consulting a qualified mechanic, to prevent further complications and ensure your safety on the road.

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