156n
Never use spray starter fluids. 
If the battery is discharged the engine 
can be started with the use of two 
jumper cables and the battery of an-
other vehicle. Always use jumper ca-
bles with fully insulated handles on the 
terminal clamps.
Contact with parts conducting 
electrical current on a running 
engine can be harmful or fatal.<
Carefully comply with the following in-
structions to avoid personal injury and 
damage to one or both vehicles:
1 Ensure that the battery on the sup-
port vehicle is also rated at 12 volts, 
and that the capacities of the two 
batteries (Ah) are roughly comparable 
(printed on casing) 
2 Leave your battery connected to the 
car electrical system 
3 Make sure that there is no contact 
between the bodywork of the two 
vehicles – short circuit risk!
4 Start by connecting the jumper cable 
from the positive terminal of the sup-
port vehicle to the positive terminal 
connector located in your BMW's 
engine compartment.
The cover of the positive terminal 
connector is marked with a "+" sign. 
Refer to the illustration. Remove by 
pulling the tab (arrow 1) 
5 Then connect the negative terminals. 
Attach the cable to either the support 
vehicle's negative battery terminal (–), 
or to a suitable ground on its engine 
or bodywork. Then connect the other 
end of the cable to a ground on the 
engine or on the bodywork of the ve-
hicle that is to be started. This a spe-
cial nut that is provided on the BMW 
(arrow 2) 
Observe the same sequence for 
connecting the jumper cables 
when helping other vehicles, otherwise 
there is the risk of injury if sparks gener-
ate at the battery.<462de253
6 If the battery on the support vehicle is 
weak, start the engine and let it run 
7 Start the engine on the vehicle need-
ing the jump-start, and allow it to run 
as usual. If the first start attempt is 
not successful, wait a few minutes 
before another attempt in order to 
allow the discharged battery to re-
charge 
8 Before disconnecting the jumper ca-
bles from your BMW, turn on the rear 
window defroster and set the blower 
to the highest speed; allow the en-
gine to run approx. 10 seconds. This 
will prevent a voltage surge from the 
voltage regulator to the electrical 
accessories 
9 Then disconnect the jumper cables in 
reverse sequence.
Depending on the cause of the fault, 
recharge the battery.
Jump-starting