Mercedes-Benz 2004 C-Class Coupe Operator's Manual page 312

Practical hints
Jump starting
Remove the jumper cables first from
negative terminals 3 and 4 and then
from positive terminals 1 and 2.
You can now turn on the lights.
Have the battery checked at the
nearest authorized Mercedes-Benz
Center.
!
Vehicles with automatic transmission:
Do not tow-start the vehicle.
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