Jump lead connection point (earth connection)
Fig. 215 In the engine compartment: jump start connection point (earth connection).
First read and observe the introductoryinformation and safety warnings⇒
Introduction
There is a jump lead connection point (earth connection) in the engine compartment for connecting
the black jump lead ⇒ Fig. 215㊀.
The vehicle can be jump-started or be used to jump-start another vehicle only via this jump lead
connection point.
Jump lead connection point (positive terminal)
Fig. 216 In the engine compartment underneath a cover: jump lead connection point (positive
terminal).
Using the jump leads incorrectly or completing the jump start procedure incorrectly can
cause the 12-volt vehicle battery to explode, which can lead to severe injuries. Please
observe the following in order to reduce the risk of the 12-volt vehicle battery exploding:
•All work on the 12-volt vehicle battery and the electrical system can cause serious
chemical burns, fire or electric shocks. Always read the warnings and safety
information before carrying out any kind of work on the 12-volt vehicle battery ⇒ 12-
volt vehicle battery.
•The vehicle battery providing assistance must have the same voltage as the flat vehicle
battery (12 volts) and approximately the same capacity (see label on battery).
•Never charge a 12-volt vehicle battery that is frozen or that has thawed. Discharged 12-
volt vehicle batteries can already freeze at temperatures of around 0°C (+32°F).
•The 12-volt vehicle battery should be replaced if it is frozen or has thawed.
•A highly explosive mixture of gases is given off when the 12-volt vehicle battery is
jump started. Always keep fire, sparks, naked flames and lit cigarettes away from the
12-volt vehicle battery. Never use a mobile telephone when the jump leads are being
connected or disconnected.
•Position the jump leads so that they never come into contact with any moving parts in
the engine compartment.
•Never confuse the negative and positive terminals or connect the jump leads
incorrectly.
•Observe the jump lead manufacturer's instructions.
WARNING
Please note the following in order to avoid considerable damage to the vehicle electrical
system:
•A short circuit can be caused if the jump leads are wrongly connected.
•The vehicles must not touch each other, as any contact could mean that electricity
could flow as soon as the positive terminals are connected.
NOTICE
First read and observe the introductoryinformation and safety warnings⇒
Introduction
In vehicles with a 12-volt vehicle battery in the luggage compartment, there is a jump lead
connection point (positive terminal) ⇒ Fig. 216⊕ under a cover in the engine compartment for
connecting the red jump lead.
The vehicle can be jump-started or be used to jump-start another vehicle only via this jump lead
connection point.
Jump starting the vehicle
Fig. 217 Diagram for connecting the jump leads (12-volt vehicle battery in the engine
compartment).
Fig. 218 Diagram showing how to connect jump leads on the vehicle providing the jump start (12-
volt battery in luggage compartment).
First read and observe the introductoryinformation and safety warnings⇒
Introduction
Key for ⇒ Fig. 217 and ⇒ Fig. 218:
Vehicle with discharged 12-volt vehicle battery that is being jump-started.
Vehicle with 12-volt vehicle battery that is supplying power and jump-starting the other
vehicle.
Suitable earth connection: preferably the jump lead connection point (earth connection), a
solid metal part which is securely bolted onto the cylinder block, or the cylinder block itself.
The discharged 12-volt vehicle battery must be properly connected to the vehicle's electrical
system.
The vehicles must not touch. Otherwise electricity could flow as soon as the positive terminals are
connected.
Ensure that the battery clamps have good metal-to-metal contact with the battery terminals.
If the engine does not start immediately, switch off the starter after about 10 seconds and try again
after about a minute.
If the engine still does not start, seek expert assistance.
Connecting jump leads (vehicles with 12-volt battery in the engine
compartment)
The jump leads should only be connected in the order A – B – C – D⇒ Fig. 217.
The black jump lead should never be connected to the negative terminal (–) on the 12-volt vehicle
battery. Connecting the lead to the negative terminal can cause incorrect condition evaluation of the
12-volt vehicle battery in the vehicle electronics.
•Switch off the ignition in both vehicles ⇒ Starting and stopping the engine.
•Open the cover on the 12-volt vehicle battery in the engine compartment, if a cover is installed
⇒ 12-volt vehicle battery.
•Connect one end of the red jump lead to the positive terminal (+) of the vehicle with the
discharged 12-volt vehicle battery ⇒ Fig. 217①⇒.
