Mercedes-Benz M-Class Operator's Manual page 344

Jump-starting
342
Turn the SmartKey to position 0 (
X
with KEYLESS-GO, make sure the ignition is switched off (
in the instrument cluster must be off.
Switch off all electrical consumers (e.g. radio, blower, etc.).
X
Open the hood (
X
Position number B identifies the charged battery of the other vehicle or an equivalent jump-
starting device.
Slide cover : of positive terminal ; in the direction of the arrow.
X
Connect positive terminal ; on your vehicle to positive terminal = of donor battery B
X
using the jumper cable, beginning with your own battery.
Start the engine of the donor vehicle and run it at idling speed.
X
Connect negative terminal ? of donor battery B to earth point A of your vehicle using
X
the jumper cable, connecting the jumper cable to donor battery B first.
Start the engine.
X
Allow the engine to run for a few minutes before disconnecting the jumper cable.
X
First, remove the jumper cable from earth point A and negative terminal ?, then from
X
positive terminal ; and positive terminal =, each time disconnecting from the contacts
on your own vehicle first.
After removing the jumper cable, close cover : on positive terminal ;.
X
Have the battery checked at a qualified specialist workshop, e.g. an authorized Mercedes-
X
Benz Center. The jump-starting procedure is not a standard operating state; therefore, have
the battery checked.
page 139) in the ignition lock and remove it. On vehicles
Y
page 312).
Y
page 139). All indicator lamps
Y
I n f o r ma t i o n P r o v i d e d b y :