Mercedes-Benz E 300 Operator's Manual page 133

Caution!
Vehicles with Acceleration Slip
Regulation (ASR)
If the vehicle is towed with the front axle
raised, the engine must be shut off
(electronic key in steering lock position
0 or 1). Otherwise, the ASR will
immediately be engaged and will apply
the rear wheel brakes.
Caution!
Vehicles with Electronic Traction
System (ESP)
If the vehicle is towed with the front axle
raised, the engine must be shut off
(electronic key in steering lock position
0 or 1). Otherwise, the ESP will
immediately be engaged and will apply
the rear wheel brakes.
Caution!
Vehicles with Electronic Traction
System (ETS)
If the vehicle is towed with one axle
raised, the engine must be shut off
(electronic key in steering lock position
0 or 1). Otherwise, the ETS will
immediately be engaged and will apply
the brakes.
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