slender
Senior Member
I bought my 57 plate diesel auto A Class about six months ago and am delighted with it overall. It has not been completely fault free but my local dealer has been pretty efficient in dealing with the one or two minor issues that have cropped up. That said, I have a problem that has them baffled - and that isn't good!!
A short while ago I noticed a high pitched noise that I can best describe as the noise the gadget makes at the dentist when you're having a scale and polish and the water is being vacced out of your mouth!! Now, this noise is either not occuring or is inaudible below 25mph, but, once I'm over 25mph I can hear it - but only from the drivers seat or the passenger seat behind the drivers seat. Strange? I've only just begun!! If anybody is sat in the passenger seat the noise reduces considerably and is often virtually inaudible. I cannot, for the life of me, locate where this noise is coming from and the Mercedes technicians (including the dealers master technician) are unable to locate it, or, and this does make matters very tricky indeed, hear it! The first time I booked it in the Mercedes technician I dealt with whispered (and I mean whispered) that it was more than likely a fault with the CVT transmission as they had had to change quite a few and it may require replacement! This surprised me as I had never read of any major issues with this transmission and I'm still unable to find anything to suggest major problems with this transmission. After that spell at the dealer the gearbox oil was topped up and they were convinced the problem was rectified. I drove it home and, yep, no noise. However, the very next morning, back it came - damn! The second time it went back they wondered if it could be a fuel pump about to pack up but elected to grease all the door seals instead - which didn't make a scrap of difference. I asked the master technician if many faults were experienced with the new A Class and he said no, though he commented on the poor reliability of the earlier previous model. No mention was made of any CVT transmission issues. On a recent holiday I could hear the noise as we drove along the motorway and then it simply stopped - but returned later. It had done that to my knowledge at least once before.
So, I now have a, strange, sometimes intermittent, whooshing noise which is undetectable to my local dealership technicians but is most definitely not a figment of my imagination! Aside of wearing ear plugs for the remainder of my ownership or getting rid of it far, far, sooner than I would really want to I'm at a bit of a loss if MB are unable to sort it.
The next step will be for me to book it in with them for three days for various components to be thoroughly checked but I thought it would be worth a post here on the slim chance that somebody may just have encountered a similar problem and be able to help me steer my local dealerships technicians in the right direction?
Thanks.
A short while ago I noticed a high pitched noise that I can best describe as the noise the gadget makes at the dentist when you're having a scale and polish and the water is being vacced out of your mouth!! Now, this noise is either not occuring or is inaudible below 25mph, but, once I'm over 25mph I can hear it - but only from the drivers seat or the passenger seat behind the drivers seat. Strange? I've only just begun!! If anybody is sat in the passenger seat the noise reduces considerably and is often virtually inaudible. I cannot, for the life of me, locate where this noise is coming from and the Mercedes technicians (including the dealers master technician) are unable to locate it, or, and this does make matters very tricky indeed, hear it! The first time I booked it in the Mercedes technician I dealt with whispered (and I mean whispered) that it was more than likely a fault with the CVT transmission as they had had to change quite a few and it may require replacement! This surprised me as I had never read of any major issues with this transmission and I'm still unable to find anything to suggest major problems with this transmission. After that spell at the dealer the gearbox oil was topped up and they were convinced the problem was rectified. I drove it home and, yep, no noise. However, the very next morning, back it came - damn! The second time it went back they wondered if it could be a fuel pump about to pack up but elected to grease all the door seals instead - which didn't make a scrap of difference. I asked the master technician if many faults were experienced with the new A Class and he said no, though he commented on the poor reliability of the earlier previous model. No mention was made of any CVT transmission issues. On a recent holiday I could hear the noise as we drove along the motorway and then it simply stopped - but returned later. It had done that to my knowledge at least once before.
So, I now have a, strange, sometimes intermittent, whooshing noise which is undetectable to my local dealership technicians but is most definitely not a figment of my imagination! Aside of wearing ear plugs for the remainder of my ownership or getting rid of it far, far, sooner than I would really want to I'm at a bit of a loss if MB are unable to sort it.
The next step will be for me to book it in with them for three days for various components to be thoroughly checked but I thought it would be worth a post here on the slim chance that somebody may just have encountered a similar problem and be able to help me steer my local dealerships technicians in the right direction?
Thanks.
. Now I know what the problem is.... how on earth can I reach this piece there is no way I can get to it 