I beleive the option is available in Europe, however what it takes to retrofit and version code may be the differculty. The system uses what is called D2B fiber optic loop controlling the system.This is configered via a Star Diagnosis system at dealers.

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Mercedes-Benz Master Guild - 2 years
Shop Foreman - 20 + years - dealer.
Part owner - MBZ Transmission remanufacture
2000 SL500
1999 ML430
1989 300SE