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2006 B 200 .....& Audi A6..
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Very helpful links..but I'm wondering why nothing has come of this well known problem that goes back at least 13 years now..

We've seen a ton of very unhappy B CVT owners who were given the "short shift" by MB here in Canada and nothing ever came of it..
 

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I have a 2007 B200 that had this problem with the CVT when it got to 94000km, Mercedes Nanaimo wanted to $2548.82 to replace or repair the valve body etc.
I went to see a transmission specialist in Surrey who knew about these problems and told me that for just under a $1000, he will send the module to Toronto where it will be checked and repaired as required. So I did and the car is running fine but still keeping my fingers crossed after reading this forum..
 

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Am I too late to join the lawsuit?

Two days ago this "Transmission - visit workshop" shows up on my 2007 B with 120k. It was the first time I saw this message. I immediately shut off the engine and restart after a min. Nothing happens since.

Dropped by Norwescan for a diagnosis and shows fault code Y3/9b4 (secondary rpm sensor) and Y3/9b5 (output rpm sensor). They say it is boffin. Quoted ~$1600 (include labour) + tax to send out for rebuild. A new unit which they can order from MB is ~$1700 + ~5 hours of labour. They say if I go to MB it would cost double or triple the cost.

Didn't ask where Norwescan send the unit to rebuild. I just have Service D done at

Didn't ask where Norwescan send for rebuild. I just had service D (transmission oil) done at Norwescan. Is it a coincidence or what?

@ Mario Borg, can you pm where you got yours rebuild? I assume under $1000 is without labour?

Anyone else have this failure recently? What did you do?

@DEVOURS, do you still have your B?
 

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2006 B200T
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922 Posts
Am I too late to join the lawsuit?

Two days ago this "Transmission - visit workshop" shows up on my 2007 B with 120k. It was the first time I saw this message. I immediately shut off the engine and restart after a min. Nothing happens since.

Dropped by Norwescan for a diagnosis and shows fault code Y3/9b4 (secondary rpm sensor) and Y3/9b5 (output rpm sensor). They say it is boffin. Quoted ~$1600 (include labour) + tax to send out for rebuild. A new unit which they can order from MB is ~$1700 + ~5 hours of labour. They say if I go to MB it would cost double or triple the cost.

Didn't ask where Norwescan send the unit to rebuild. I just have Service D done at

Didn't ask where Norwescan send for rebuild. I just had service D (transmission oil) done at Norwescan. Is it a coincidence or what?

@ Mario Borg, can you pm where you got yours rebuild? I assume under $1000 is without labour?

Anyone else have this failure recently? What did you do?

@DEVOURS, do you still have your B?
If you plan on keeping the car, then $1600 would be your cheapest and easiest solution. They take the TCU out and open it up, resolder the connection and reinforce it. Seal the unit back up and then put it back in. Norwescan normally can do it, but with the renovations going on, I don't think their clean room is up and running. So, they will need to send it out to get it done. The extra cost of shipping and time. If MB does it, they get you a new TCU and Valve Body and you're looking at several thousand dollars.
 

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W123 '83 200, W210 '98 E200K, W212 '13 E350
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1,781 Posts
How much is the fluid again at the dealer?

Just wondering. I haven't really kept up on the threads and I only had a manual B.

I see the sensors themselves (pair) for $100-$150 CAN, whole TCU's (repaired) for $400-900

So other than the time spent (labour), the rest is pure profit. I'm all for fair wages for skill/labour/experience, but seems like there's room for a few more players. I'm surprised there aren't more people offering this service. I do know there's someone in the GTA doing this.

I have to do some research...
 
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