Mercedes-Benz SLS-Class 2014 Owners Manual - Manual (Page 243)

R If the battery is fully discharged, leave the battery that is being used to jump-start connected
for a few minutes before attempting to start. This charges the battery slightly.
R Make sure that the two vehicles do not touch.
Make sure that:
R the jumper cables are not damaged.
R when the jumper cables are connected to the battery, uninsulated sections of the terminal
clamp do not come into contact with other metal sections.
R the jumper cables cannot come into contact with parts such as the V-belt pulley or the fan.
These parts move when the engine is started and while it is running.
X
Press the electric parking brake handle.
X Shift the transmission to P with the button in the center console.
X Remove the SmartKey from the ignition lock.
X Switch off all electrical consumers (e.g. radio, blower, etc.).
X
Open the hood (
Y
page 218).
Position number B identifies the charged battery of the other vehicle or an equivalent jump-
starting device.
X
Slide cover A of positive terminal : in the direction of the arrow.
X Connect positive terminal : on your vehicle to positive terminal ; of donor battery B
using the jumper cable, beginning with your own battery.
X Start the engine of the donor vehicle and run it at idling speed.
X Connect negative terminal = of donor battery B to earth point ? of your vehicle using
the jumper cable, connecting the jumper cable to donor battery B first.
X
Start the engine.
X
Before disconnecting the jumper cables, let the engine run for several minutes.
Jump-starting
241
Breakdown
assistance
Z