W222 Service Messages Keep Coming

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  • Thread starterDubai80
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Dubai80
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W222 2018 odometer appears to be rolled back and service messages continue to come in after being cleared. For example, service A appears after it is cleared, service B appears after the next start of the car.
Any ideas how can I clear these messages using DTS Monaco because Xentry didn't help much when I cleared these messages using it.
 
You need to update the PTCU module.
 
Thanks for the reply, I did a search and it seems there are really few updates for PTCU, but this work seems critical to me and I can't miss it. Do dealers do this as part of the recall or should I contact MB programmers to do this online?
 
Use dealer Xentry scan tool then do quick test, go to PTCU, select special function then you can do initialization.
 
Thanks for the reply, I did a search and it seems there are really few updates for PTCU, but this work seems critical to me and I can't miss it. Do dealers do this as part of the recall or should I contact MB programmers to do this online?

For such work you need to use Xentry. I don't understand what the problem is. I think you'd better contact MB for this work, they will help you in this simple situation without any problems.
 
This is a common thought, but I usually have to jump between PTCU/cluster/engine, sometimes randomly, and do service syncs. I get asked to update them all the time, but that rarely fixes the problem.

So I do the cluster service, then the engine/PTCU, and if the problem still isn't fixed I go back to the cluster and do it all over again, and that usually fixes the problem.

Benz tuners have done a great job tuning the X engine. New chassis, same engine, now with PTCU, tuning won't help without tuning the PTCU, it acts (as far as I know) as if it were double checking the operation of the other drivetrain modules. Like radar sensors in new cars, ADAS systems apparently need to be double-checked for integrity.
But this is just my opinion.
 
I also have one radar misalignment error.
 
I think the best solution is MB Dealer.
 

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