270 Remote control
Te ch n ica l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hintsCar care Index
Remote control battery replacement
Changing batteries
Unfold master key from holder by pressing key release 
button. Pull off battery cover (1).
Change batteries, inserting new ones with (+) side 
facing up.
Press battery cover onto housing until locked in place.Notes:
To assure proper operation of the remote control, push 
each button. Repeat battery installation, if remote 
control does not function correctly.
If the remote control does not function correctly after 
repeating battery installation, the system may have to be 
resynchronized, see below.