It is never pleasing to experience a sound on your vehicle that you don’t know where it comes from. You may be wondering what to do when you detect a reversing gear noise that lasts on your Mercedes Classe A? Any gearbox problem can be serious, but before making sure, it is better to do a few inspections. Our team has created this document to support you solve it. First, we will see what the sources and the different gearbox noises can be on Mercedes Classe A, and second, what are the solutions available to you.
Classical reverse Mercedes Classe A noises and some tips to look after your gearbox
Why does the reversing of my Mercedes Classe A make a different noise from my other speeds?
De facto, adding all gears, bearings and pinions into a gearbox is a difficult exercise. The noise made by the reversing of your Mercedes Classe A is logical. It can be explained in a fairly simple way. In fact, the gears used for conventional speeds (1st to 5th or 6th) are so-called “helical” gears (oblique gears) . The use of such a pinion makes the noise caused by the gears much less important than with spur gears chosen for the reverse gear.
Tips to limit wear on your clutch and gearbox
- Don’t give a big boost:
Certainly, if you kick the throttle hard when you are in reverse or when you put the vehicle in the revs, you risk to burn your clutch or gnawing at the gearbox pinions. - Never reverse while the vehicle is in motion or vice versa:
Reversing the direction of operation of the gearbox during operation is a very bad plan. In fact, the pressure you will put in on the gears will be monumental and you will generate a premature wear and tear of the gears. You can even break the gears of your gearbox at speed by doing so. It will therefore be completely common if you hear a reverse noise on your Mercedes Classe A if you shift gear under these conditions.
Different Mercedes Classe A reversing noises and their origins
Finally in this section, we will move on to what you are probably most interested in this page, to find out about the source of reversing noise on Mercedes Classe A. Here are the 3 typical sounds you may be victim of.
I find out a grinding noise when starting in reverse gear
If you experience a grinding noise when you start in reverse with your Mercedes Classe A, it may be the engine mounts that are tired. Certainly, when the engine is in reverse gear, due to the pinions we saw above the vibrations generated by the gearbox are higher and it is therefore conceivable that due to their wear the silentblocks no longer absorb the engine vibrations well. In this circumstance, do not hesitate to consult this content for more info about strut mount noises on Mercedes Classe A.
An increased reverse knocking noise on Mercedes Classe AX
If you are subject to a knocking noise when you are in reverse with your Mercedes Classe A and this noise tends to amplify as you gain speed. It is conceivable that you are experiencing a serious problem that needs to be fixed as soon as possible before ruining your entire gearbox. In fact, an intensifying rattling noise means that the gears are damaged. If they are, debris will disperse to the rest of the box and damage other gears very fast. Take your vehicle to your auto technician quickly or check out this content page about gearbox noise on Mercedes Classe A for more details.
I acknowledge a noise when I go in reverse
Experiencing a noise when you shift into reverse is normal and connected to the gears and sprockets used in the gearbox. If, on the other hand, you have the feeling that your Mercedes Classe A reverse gear makes more noise than before, it is conceivable that filings have been produced and are moving around in it. It is therefore time to empty the box.
