2018 Mercedes-Benz G65 AMG Is Leaking Oil

Address Oil Leaks in Your 2018 Mercedes-Benz G65 AMG Effectively

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Reviewed by
Aisha
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 2018 Mercedes-Benz G65 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 2018 Mercedes-Benz G65 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

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 and repair an oil leak in a 2018 Mercedes-Benz G65 AMG?

When tackling an oil leak in your 2018 Mercedes-Benz G65 AMG, it's essential to adopt a diagnostic approach that prioritizes clarity and efficiency. Start by carefully inspecting the engine to pinpoint the leak's origin, focusing on common culprits like the oil pan, valve cover gaskets, and oil filter housing. Before diving into repairs, check the oil levels to ensure they are adequate, as low oil can lead to further complications. Cleaning the engine area is crucial; it not only helps in identifying the leak but also prepares the surface for any necessary repairs. Pay close attention to gaskets and seals, replacing any that show signs of wear or damage. If the source remains elusive, consider using UV dye in the oil, which can illuminate the leak under UV light, making it easier to identify. Once the faulty component is located, proceed with the necessary repairs or replacements, ensuring that all parts are properly fitted to prevent future leaks. After completing the repairs, run the engine and monitor for any signs of leakage over the next few days, confirming that your efforts have successfully resolved the issue. This methodical approach not only aids in effective diagnosis and repair but also enhances your understanding of your vehicle's mechanics, empowering you as a DIY enthusiast.

What are the common causes of oil leaks in a 2018 Mercedes-Benz G65 AMG?

When diagnosing oil leaks in a 2018 Mercedes-Benz G65 AMG, it's crucial to understand the common problems that may arise. One frequent culprit is the oil pan gasket, which can degrade over time, leading to leaks that can compromise engine performance. Additionally, faulty valve cover gaskets are another common issue; if these gaskets are worn or damaged, they may fail to create a proper seal, resulting in oil seeping out. The oil filter housing gasket is also a potential source of leaks, as wear and tear can cause it to malfunction. Furthermore, damaged oil cooler lines can contribute to oil leaks, particularly if they are cracked or compromised. Lastly, oil seal leaks, especially around critical components like the crankshaft or camshaft, can lead to significant oil loss. 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 looking to keep their G65 AMG in top condition.

How urgent is it to address the oil leak in my 2018 Mercedes-Benz G65 AMG, and what are the potential risks of neglecting this issue?

Addressing an oil leak in your 2018 Mercedes-Benz G65 AMG 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 decreased oil levels that compromise the lubrication of essential engine components. This lack of lubrication increases friction and heat, which can ultimately result in severe engine damage, potentially costing you thousands in repairs. Moreover, the presence of leaking oil poses a significant fire hazard, especially if it comes into contact with hot engine parts. Beyond the immediate risks to your vehicle, neglecting an oil leak can have environmental repercussions, as spilled oil can contaminate soil and water sources. Therefore, it is imperative to consult a qualified mechanic as soon as you notice any signs of an oil leak to ensure the safety and longevity of your vehicle. Taking prompt action not only protects your investment but also contributes to a safer driving experience and a healthier environment.

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2018 Mercedes-Benz G65 AMG Oil Leak Causes & Repairs