Mercedes-Benz 2015 M-Class Operator's Manual page 178

Automatic transmission
176
i AMG vehicles: it is not possible to use
kickdown in manual drive program M.
Switching off the manual drive program
Vehicles with the ON&OFFROAD pack-
X
age: press the program selector button
( page 172).
Y
The M message in the multifunction display
goes out.
AMG vehicles: press the program selector
X
button ( page 172) repeatedly until C or S
Y
appears in the multifunction display.