2023 Mercedes-Benz GLB35 AMG Is Leaking Oil

Common Causes of Oil Leaks in Your 2023 Mercedes-Benz GLB35 AMG and How to Address Them

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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 2023 Mercedes-Benz GLB35 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 2023 Mercedes-Benz GLB35 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 2023 Mercedes-Benz GLB35 AMG?

To diagnose an oil leak in your 2023 Mercedes-Benz GLB35 AMG, begin with a thorough visual inspection of the engine and undercarriage. Look for any signs of oil pooling or dripping, as these can provide immediate clues to the leak's source. Next, check the oil levels in the engine; a significant drop may indicate a leak that needs attention. Pay close attention to the gaskets and seals, particularly the valve cover gasket, oil pan gasket, and oil filter housing gasket, as these are common culprits for oil leaks. Additionally, inspect the oil filter for any signs of damage or leakage. If the source remains elusive, consider performing a pressure test on the oil system, which can help pinpoint the leak's exact location. Should these steps not yield results, consulting a qualified mechanic or dealership is advisable for a professional diagnosis and repair. By following this structured approach, you can effectively identify and address oil leaks in your vehicle, ensuring it remains in optimal condition.

What are the common causes of oil leaks in a 2023 Mercedes-Benz GLB35 AMG?

Understanding the common causes of oil leaks in your 2023 Mercedes-Benz GLB35 AMG is crucial for maintaining the health of your vehicle. One of the primary culprits is degraded gaskets and seals, which can wear out over time due to the engine's heat and pressure, leading to leaks. Additionally, a loose or damaged oil pan can result from road debris or improper installation, allowing oil to escape. It's also important to check the oil filter; if it’s faulty or improperly sealed, it can cause significant leaks. Worn piston rings may allow oil to seep into the combustion chamber, contributing to oil consumption and leaks. Furthermore, issues with the valve cover gasket can lead to oil leaking from the top of the engine, while a failing oil cooler seal can create leaks near the oil cooler. Regular inspections and prompt attention to these areas can help prevent more serious engine damage, making it essential for GLB35 AMG owners to stay vigilant about oil leak signs.

How urgent is it to address the oil leak in my 2023 Mercedes-Benz GLB35 AMG?

Addressing an oil leak in your 2023 Mercedes-Benz GLB35 AMG is an urgent matter that should not be overlooked. The immediate risk of engine damage due to loss of lubrication can lead to overheating and the failure of critical components, which may result in costly repairs. Furthermore, neglecting the leak can exacerbate the problem, leading to more severe engine issues over time, ultimately jeopardizing the vehicle's performance and reliability. Safety is another crucial factor; oil leaks can create hazardous conditions, such as the risk of fire if oil comes into contact with hot engine parts. Additionally, timely maintenance not only protects your vehicle but also preserves its resale value, as potential buyers are often deterred by known issues. Therefore, it is essential to act swiftly and address any oil leaks to ensure the longevity and safety of your Mercedes-Benz GLB35 AMG.

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2023 Mercedes-Benz GLB35 AMG Oil Leak Causes & Repairs