Some routine service actions such as changing the engine unit oil might seem obvious and very important, while others such as changing the gearbox oil from its Mercedes Benz GLS Class may seem less natural. However, produce no mistake, changing the gearbox is just as important as changing the engine unit oil. This content will show you the role of the gearbox oil, then, why it is essential to replace the gearbox of your Mercedes Benz GLS Class, and at last, how to replace the gearbox oil of a Mercedes Benz GLS Class .


Purpose of gearbox oil on a Mercedes Benz GLS Class

So we start our content with the role of gearbox oil on a Mercedes Benz GLS Class. The objective of this short introduction is to produce you understand the benefit of this fluid which assures the good performance of your motor vehicle. The gearbox of your car has the mission to demultiply the power transferred by the engine unit and send it back to your wheels . It is made up of pinions and gears that will allow the wheels to rotate at different speeds depending on the curves and the gear engaged. It will operate with the help of an axle and a differential. All these parts will need to be strongly lubricate to function accurately, limit friction and tolerate the high temperatures built by the engine unit and friction. Your transmission oil has a high viscosity and will prevent the formation of filings or gear breakage, so it is fundamental to the correct working of the gearbox.

Why replacing the gearbox oil from a Mercedes Benz GLS Class?

Now we’ll see what’s the point of draining the gearbox oil of your Mercedes Benz GLS Class?

Benefit of gearbox oil changing Mercedes Benz GLS Class

There are some interests to replace the gearbox of your motor vehicle repeatedly, we will list them and detail them below:

  • Over time, the oil will lose its viscosity due to friction and temperature rise, which will cause less lubrication of the gears and pinions and therefore risk to break some of them.
  • Same as viscosity, time and temperature rise will decrease the oil resistance to the engine unit temperature, So it will fluidize much more easily when the engine heats up, which is not good for your gearbox.
  • Accumulation of metallic residues: Finally, regardless if you constantly have a quality oil, a gearbox is an component that wears out and produces iron filings with friction, the oil will pick them up and if it accumulates too much these residues can get into gears and break them.

When to do the gearbox oil replace on a Mercedes Benz GLS Class?

Whether you want to do an automatic or manual gearbox oil change on Mercedes Benz GLS Class or strong> the process is not similar, however, dealers do not give mileage suggestions to replace the oil in your gearbox, however when you do an intervention on the gearbox it is wise to replace it, in any other case here are the causes to produce you think about doing this oil replace.

Oil replace for manual gearbox Mercedes Benz GLS Class

  • Gears are jumping: you are almost certainly missing oil and you may possibly have a gearbox oil leak, please see our content on gearbox leaks on Mercedes Benz GLS Class for more information.
  • The gearbox cracks when you switch gears: The oil has undoubtedly lost viscosity and is too fluid, so the gears get stuck.
  • Difficulty to shift gears: Same issue as just before, the oil is absolutely too fluid.

Automatic gearbox oil replace

  • A slow start from the neutral position to the first one: quite often a viscosity issue.
  • Difficulty or even impossibility to shift gears: Lack of oil


How to replace gearbox oil of a Mercedes Benz GLS Class?

Finally, to end this content, we will show you you how to empty the gearbox oil of your Mercedes Benz GLS Class , it’s much easier than you might think, here are the few actions to follow to do it accurately:

  • Heat your Mercedes Benz GLS Class for about 10 minutes to get a fluid oil, place it flat on 4 stands.
  • Install a drain pan under the drain plug, open it, and clean it well because it will almost certainly gather filings.
  • Let all the oil run out until it’s all gone.
  • Replace and tighten the cap, then fill with a syringe through the filler cap with the manufacturer’s recommended dose

If you need more guides on the Mercedes Benz GLS Class, go to our Mercedes Benz GLS Class category.