2016 Mercedes-Benz CLA45 AMG Is Leaking Oil

Address Oil Leaks in Your 2016 Mercedes-Benz CLA45 AMG Effectively

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Reviewed by
Bo Fader
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 2016 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 2016 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.

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 2016 Mercedes-Benz CLA45 AMG?

When diagnosing an oil leak in a 2016 Mercedes-Benz CLA45 AMG, it's essential to adopt a systematic approach that begins with straightforward visual inspections and progresses to more complex diagnostic methods. Start by thoroughly examining the engine and undercarriage for any visible signs of oil, such as drips or pools, which can help you identify the leak's source. Next, check the oil levels to determine if there has been a significant loss, indicating a potential leak. Pay close attention to the oil filter and drain plug, as these components can often be the culprits; ensure they are secure and free from leaks. Additionally, inspect the gaskets and seals around critical engine areas like the oil pan and valve cover for any signs of wear or damage. If the leak remains elusive, consider performing a pressure test on the oil system to uncover hidden leaks. For a more precise diagnosis, adding UV dye to the engine oil can help pinpoint the leak's location when illuminated with a UV light. If these methods do not yield results, or if the issue appears to be more complex, consulting a qualified mechanic is advisable to ensure proper diagnosis and repair. By following this structured diagnostic approach, you can effectively identify and address oil leaks in your vehicle.

What are the common causes of oil leaks in a 2016 Mercedes-Benz CLA45 AMG?

When dealing with oil leaks in a 2016 Mercedes-Benz CLA45 AMG, it's essential to understand the common culprits that could be causing the problem. One frequent issue is a degraded or damaged oil pan gasket, which can wear out over time and lead to significant oil loss. Another potential source of leaks is the valve cover gasket, which may deteriorate and allow oil to escape from the engine. Additionally, the oil filter housing gasket can fail, resulting in leaks within the engine compartment, while oil cooler seals can also develop leaks, causing oil to seep out. Lastly, problems with the timing cover can contribute to oil leaks as well. For DIY enthusiasts, identifying these issues early through regular maintenance and inspections can help prevent more severe engine damage and costly repairs down the line.

How urgent is it to address the oil leak in my 2016 Mercedes-Benz CLA45 AMG?

Addressing an oil leak in your 2016 Mercedes-Benz CLA45 AMG is not just a matter of routine maintenance; it is an urgent issue that requires immediate attention. Oil leaks can significantly reduce oil levels, leading to inadequate lubrication of vital engine components, which increases the risk of severe engine damage over time. Furthermore, neglecting an oil leak can result in engine overheating, potentially causing catastrophic mechanical failures that could leave you stranded or facing costly repairs. Additionally, the safety implications cannot be overlooked; leaking oil can drip onto hot engine parts, creating a fire hazard that endangers both you and your vehicle. Therefore, it is essential to act swiftly and address any signs of an oil leak to safeguard your engine's health and ensure your safety on the road.

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2016 Mercedes-Benz CLA45 AMG Oil Leak Causes & Solutions