Mercedes-Benz R-Class Owner's Manual page 328

Disconnecting the battery
G Risk of accident
If the battery is disconnected:
the brake boosting effect will not be avail-
R
able. Greater braking force will then be
required and the brake pedal travel will
be longer. If necessary, depress the
brake pedal with maximum force.
you can no longer turn the key in the igni-
R
tion and, on vehicles with KEYLESS
GO*, pressing the KEYLESS GO button*
will have no effect
the selector lever is locked in position P
R
!
Always disconnect the battery in
the order described below. Never swap the
terminal clamps. You may otherwise dam-
age the vehicle electronics.
Firmly depress the parking brake and shift
X
the DIRECT SELECT lever to position P.
Switch off the engine.
X
Turn the key to position 2 (
X
Y
ignition lock.
Switch off all electrical consumers.
X
* optional
Open the front right-hand door.
X
Position the right-hand front seat at its rear-
X
most position:
partially electric seat adjustment
R
( page 78)
Y
fully electric seat adjustment
R
( page 79)
Y
Front right seat rail cover
1
Front left seat rail cover
2
Pull right-hand cover
X
direction of the arrow and pull it off the seat
rail.
page 76)in the
Pull left-hand cover
X
possible in the direction of the arrow.
i
Left-hand cover
pulled off the seat rail.
3
Loosen and remove fastening nuts
X
along the edge of the carpet.
i
a shaft at least 30 cm long (not included in
the vehicle tool kit).
Position the right-hand front seat as far
X
forward as possible:
partially electric seat adjustment
R
(
1 forwards in the
fully electric seat adjustment (
R
Turn the key to position 0 (
X
2 as far forwards as
the ignition lock.
2 cannot be completely
Practical advice
Battery cover fastening nuts
To do this, you need a 6 mm Allen key with
page 78)
Y
Y
page 76) in
Y
Battery
3
page 79)
Z
325