Mercedes-Benz gearbox problems

The Mercedes-Benz gearbox is one of the most important components in your Mercedes-Benz. It is responsible for transferring power from your engine to your wheels, whilst ensuring that the correct gear shift ratios take place. It may sound simple, however due to the complexity of these gearbox systems there can be a range of Mercedes-Benz Gearbox problems that may need to be identified by Mercedes-Benz gearbox specialists to ensure that any gearbox problem is identified and correctly addressed to ensure that you continue to experience smooth gear shifts.

Let’s take a look at some of the most common causes for Mercedes-Benz gearbox problems.

Unusual noises while driving

High-pitched or grinding noises while the vehicle is in motion could be a sign of a Mercedes-Benz gearbox problem. These sounds could be caused by low gearbox oil levels, gearbox oil contaminants, or a centre or front differential lacking oil. This is applicable to both automatic and manual gearboxes. Chipped gears or a failed synchroniser in the case of manual gearboxes could also cause these unusual noises. It is crucial to visit a Mercedes-Benz gearbox specialist to conduct a thorough inspection and undertake comprehensive Mercedes-Benz specialised diagnostics to determine the problem and complete the necessary Mercedes-Benz gearbox repairs.

Gearbox oil leaks

In Mercedes-Benz automatic gearboxes several components such as seals, gaskets, oil cooler hose fittings or the oil cooler may deteriorate or fail, resulting in a gearbox oil leak. If you experience slippage while driving around a sharp bend or up or downhill, it could be a sign that your gearbox is leaking oil, which will in turn result in a low gearbox oil level.

Undetected gearbox oil leaks account for the majority of gearbox mechanical failure. Oil quality and oil pressure are responsible for the proper lubrication and oil pressure of your gearbox. Should you be experiencing slippage, loss of gears or if any oil leaks are detected, it is imperative to address this sooner rather than later to prevent complete mechanical gearbox failure. The condition and level of the gearbox oil, plays a huge role in shift quality.

Gearbox electronic problems

Technology plays a pivotal role in a Mercedes-Benz automatic vehicle. These vehicles are fitted with multiple control modules throughout. The gearbox is no exception and is fitted with its very own transmission control module which communicates with various other control modules to ensure smooth and seamless operation of the gearbox.

Transmission control modules are prone to failure for various reasons such as vibrations and voltage overload, however the main reason is damage to the internal circuitry, which is normally caused by heat fluctuations within the control module, mostly applicable to models that are fitted with an integrated transmission control module. A faulty transmission control module can cause various problems including, erratic shifting, harsh gear engagement or “limp mode”.

Limp mode is a safety that will disable the transmission control module, preventing gear shifts and causing the gearbox to default to single usable gear.

Whilst older models do not rely on electronic information from control modules, it is important to pay special attention to all vacuum lines and cables to ensure that they are in good working order and set correctly for optimal gear shifts and extended life.

The benefits of consulting Mercedes-Benz gearbox specialists

Gearbox systems contain many complex parts that a novice may find challenging to troubleshoot, diagnose, and repair. As a result, comprehensive diagnostics are best left in the hands of reputable Mercedes-Benz gearbox specialists who are knowledgeable and have the technical expertise to handle your Mercedes-Benz gearbox repairs.