Gearbox M mode upgrade
i have a W212 E550 4matic from 2010
and want to upgrad the "m" mode by my gearbox.
at the moment i have the "s" and "c" mode.
i have the paddels on my steering wheel and the sports package 951
anybody know what my dealer have to do ?

i can make it about my vediamo but i want to change it for ever in vedoc


