2017 Mercedes-Benz S550 Is Leaking Oil

Address Oil Leaks in Your 2017 Mercedes-Benz S550 Effectively

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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 2017 Mercedes-Benz S550 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 S550 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 initial steps to diagnose the oil leak in a 2017 Mercedes-Benz S550?

When diagnosing an oil leak in a 2017 Mercedes-Benz S550, start with a thorough visual inspection of the engine and the area beneath the vehicle to identify any visible signs of oil accumulation. This initial step can often reveal the source of the leak, such as drips or pools of oil. Next, check the oil levels in the engine; a significant drop may indicate a leak that needs addressing. Pay close attention to the oil filter and drain plug, as these components can sometimes be the culprits behind leaks if they are loose or damaged. Additionally, inspect the gaskets and seals around the oil pan, valve cover, and oil filter housing for any signs of wear or deterioration. If the leak remains elusive, consider performing a pressure test on the oil system, which can help uncover leaks that are not immediately visible. Should these steps not yield results, consulting a qualified mechanic with experience in Mercedes-Benz vehicles is advisable for further diagnosis. By following this structured approach, you can effectively identify and address oil leaks in your vehicle.

What are the common causes of oil leaks in a 2017 Mercedes-Benz S550?

When dealing with oil leaks in a 2017 Mercedes-Benz S550, 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 down over time, leading to leaks. Similarly, worn-out valve cover gaskets often become brittle and cracked, allowing oil to escape. Another potential source of leaks is the oil filter housing gasket; if this component is damaged, it can result in significant oil seepage. Additionally, oil cooler lines are susceptible to wear and tear, which can lead to leaks as well. Lastly, damaged oil seals, such as those found around the crankshaft or camshaft, can also contribute to oil leaks. Addressing these issues promptly is essential to maintain engine health and performance, making regular inspections and maintenance a vital part of vehicle care.

How urgent is it to address the oil leak in my 2017 Mercedes-Benz S550?

Addressing an oil leak in your 2017 Mercedes-Benz S550 is not just a matter of routine maintenance; it is a critical issue that demands immediate attention. Ignoring an oil leak can lead to a cascade of problems, including severe engine damage due to low oil levels, which are essential for proper lubrication and performance. The longer you wait, the more likely you are to experience a decline in your vehicle's performance, potentially leaving you stranded or facing costly repairs that could have been easily avoided. Moreover, oil leaks pose safety risks, as they can create slippery surfaces on the road, increasing the likelihood of accidents. Therefore, it is imperative to act swiftly and have the leak inspected and repaired by a qualified mechanic to ensure your vehicle remains safe and reliable.

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