If the battery is discharged, it is possible to have the Mercedes E-Class (W211) with an additional battery. It is also possible to use another vehicle as a secondary battery.
The following rules should apply:
-Starting the engine with a secondary battery only needs to be produced on a cold start.
-If the battery is frozen, do not start the engine (need to be recharged).
-Produce the engine only from batteries with a rated voltage of 12 V.
-Don't confuse the launch cables.
Special launch cables can be purchased from any shop where the original parts of Mercedes-Benz are sold.