The only thing that will work with the intelligent steering wheel is the
Merc factory-fitted telephone system.  Unless somebody in ths NG knows,
you'll have to ask a dealer if it can be retrofitted.  Or, what do you mean
by "Apparerently everything is there" and who said it?

Will probably cost several hundred pounds at least.

These days even attempting a retrofit may not be worthwhile as the phones
and their interfaces change so quickly.  Perhaps there is some prewiring.
This was an option on cars bought in Germany (which I did), allowing one to
fit another cradle later.  I took the full system option as my mobile phone
operator in the UK told me he would not use any such wiring but install
everything.

DAS

For direct contact replace nospam with schmetterling
---