Hi, my W211 MB has the tyre pressure monitor feature. Some time ago I
had a new set of tyres changed to the car (changed from winter tyres to
summer tyres). New sensors were installed on the new set of tyres. Now
when the system is initialised according to the advice on the user
manual, the car responds after a while “Visit Workshop”.

The car did visit an official workshop but the local one really does not
know too much of “this complicated” features. They told their service
tools indicating that the car should be driven 35 kilometres to get
calibrated. However, after a few kilometres, the car computer again asks
to visit workshop.

Would anybody be aware how a second set of tyres should really be
installed on a car with RDC. Specifically, is the battery on the sensors
connected “off the self” or should something be done with the sensors
before installation to the wheels (I’m thinking of an insulator that
often disconnects the battery when the device is “on the shelf”).

Is there a need to initialise the car computer to recognise a new set of
sensors? If so, I assume the car can accept at least 8 sensors as it
should be possible to change from winter tyres to summer tyres without a
workshop visit. The sensors were installed by a tyre dealer, if they
have an individual code that needs to be told to for the car computer,
then I guess the tyres need to be uninstalled to find this information
from each sensor (I never saw those sensors as my local, official
workshop gave them directly to the tyre dealer?

I believe I either have to visit another workshop (I know one but I
would need to drive an extra 100 km) or need to have some guidance from
the news group for the local workshop, if there is an easy way to make
them learn.

Thanks for any advice, a W211 CDI driver.