Brian WH
MB Enthusiast
During the cold mornings I had noticed that the gearbox at 30mph would give the impression of hunting between the gears. This was disturbing but not too worrying. After talking to a friend with a W211 he, during a visit to his dealer mentioned it. The dealer said that there was a flash update which cured this problem. So I booked the car in yesterday.
My dealer checked my car after letting it go cold and found "No Fault" with it? They reset the gearbox data and returned the car to me, to see how it went. On the way home I got stuck in traffic, and was crawling along at 1100 revs, when I thought someone had rammed me up the back. It was the gearbox changing from first to second. Very disconcerting.
It also did it again going from first to second and second to third, but not so violently.
I rang the dealer back and took it in again today for a test drive with the Technician who had dealt with it. I drove and showed him how violent the changes were, although they were better than yesterday. He admitted it was not right and said he would make further enquiries on Monday and they would let me know what they were going to do about it.
In discussion with the Technician he said that my Gearbox had already got the latest flash updates, but that he had known of similar problems with the seven speed boxes. They are OK when they work he said.
The last one with this problem they tried changing the auto change valve but as that didn't work they changed the gearbox.
The MB Service Bulletins posted by "Wully" in the favorites section brought up this one for harsh gearshifts on 7 speed boxes.
http://www.alldata.com/tsb/Mercedes-Benz/1152860400000_1153724400000_P-27-60-61E/index.html
Has anyone else experienced problems with their 7 speed boxes???
My dealer checked my car after letting it go cold and found "No Fault" with it? They reset the gearbox data and returned the car to me, to see how it went. On the way home I got stuck in traffic, and was crawling along at 1100 revs, when I thought someone had rammed me up the back. It was the gearbox changing from first to second. Very disconcerting.


I rang the dealer back and took it in again today for a test drive with the Technician who had dealt with it. I drove and showed him how violent the changes were, although they were better than yesterday. He admitted it was not right and said he would make further enquiries on Monday and they would let me know what they were going to do about it.
In discussion with the Technician he said that my Gearbox had already got the latest flash updates, but that he had known of similar problems with the seven speed boxes. They are OK when they work he said.



The MB Service Bulletins posted by "Wully" in the favorites section brought up this one for harsh gearshifts on 7 speed boxes.
http://www.alldata.com/tsb/Mercedes-Benz/1152860400000_1153724400000_P-27-60-61E/index.html
Has anyone else experienced problems with their 7 speed boxes???
