Starting assistance and charging the 12 V battery
Requirements:
The vehicle is secured with the electric parking brake.
Automatic transmission: the transmission is in position
. Manual transmission: the transmission is in neutral.
The ignition and all electrical consumers are switched off.
The bonnet is open.
Slide cover 
of positive clamp 
on the jump-starting connection point in the direction of the arrow.
of positive clamp on the jump-starting connection point in the direction of the arrow. Connect positive clamp on your vehicle to the positive pole of the donor battery using the jump lead/charging cable. Always begin with positive clamp on your own vehicle first.
on your vehicle to the positive pole of the donor battery using the jump lead/charging cable. Always begin with positive clamp on your own vehicle first. During starting assistance:
start the engine of the donor vehicle and run at idle speed. Connect the negative pole of the donor battery and earth point 
of your own vehicle by using the jump lead/charging cable. Begin with the donor battery first.
of your own vehicle by using the jump lead/charging cable. Begin with the donor battery first. During starting assistance:
start the engine of your own vehicle. During the charging process:
start the charging process. During starting assistance:
let the engines run for several minutes. During starting assistance:
before disconnecting the jump lead, switch on an electrical consumer in your own vehicle, e.g. the rear window heater or lighting. When the starting assistance/charging process is complete:
First, remove the jump lead/charging cable from earth point and negative pole of the donor battery, then from positive clamp and positive pole of the donor battery. Begin each time with the contacts on your own vehicle first.
and negative pole of the donor battery, then from positive clamp and positive pole of the donor battery. Begin each time with the contacts on your own vehicle first. After removing the jump lead/charging cable, close cover of positive clamp .
of positive clamp . Further information can be obtained at a qualified specialist workshop.