Mark A
Senior Member
my 08 ML-420 has recently developed a whining sound, which is particularly noticeable at low speed.
It sounds like the noise is coming from the gearbox area, the vehicle has 123k on the clock now and I have owned it for the last 95k of that. Gearbox oil changes have been done every 35-40k and the valve body was changed at about 40k. Are there known issues with the 7g box bearings ??
I have been in communication with one of refurb places and they say that it sounds like a failed/failing bearing but couldn’t confirm until they get the box (600 miles away). If it was bearings they say that it is a full rebuild @ £3K inc VAT (excluding removal & refitting) and it will take at least a week as they don’t have a similar box to do an exchange.
I guess the alternative would be to look for a replacement box from a breakers, assuming I find one from W164 420CDI is it a straight swop or would I also need my local garage to swap over the valve body/conductor plate?
The noise isn’t too bad at the mo, what’s the worst that could happen if I continued using it as is ?
Mark
It sounds like the noise is coming from the gearbox area, the vehicle has 123k on the clock now and I have owned it for the last 95k of that. Gearbox oil changes have been done every 35-40k and the valve body was changed at about 40k. Are there known issues with the 7g box bearings ??
I have been in communication with one of refurb places and they say that it sounds like a failed/failing bearing but couldn’t confirm until they get the box (600 miles away). If it was bearings they say that it is a full rebuild @ £3K inc VAT (excluding removal & refitting) and it will take at least a week as they don’t have a similar box to do an exchange.
I guess the alternative would be to look for a replacement box from a breakers, assuming I find one from W164 420CDI is it a straight swop or would I also need my local garage to swap over the valve body/conductor plate?
The noise isn’t too bad at the mo, what’s the worst that could happen if I continued using it as is ?
Mark