2009 Mercedes SL-Class Owner's Manual - Page 335

Practical hints Towing the vehicle X X Switch off the ignition and leave the SmartKey in the starter switch. Switch on the hazard warning flasher (Y page 102). ! Make sure that the ignition is switched off. If the starter switch is in position 2, active braking action through the ESP® may otherwise seriously damage the brake system. ! The vehicle may be towed only for distances up to 30 miles (50 km) and at a speed not to exceed 30 mph (50 km/h). Towing with all wheels on the ground G Warning! If circumstances require towing the vehicle with all wheels on the ground, always tow with a tow bar if: Rthe engine will not run Rthere is a malfunction in the electrohydraulic brake system Rthere This is necessary to adequately control the towed vehicle. Prior to towing the vehicle with all wheels on the ground, make sure the SmartKey is in starter switch position 2. G Warning! With the engine not running, there is no power assistance for the brake and steering systems. In this case, it is important to keep in mind that a considerably higher degree of effort is necessary to brake and steer the vehicle. Adapt your driving accordingly. X X X X X X i To signal turns while being towed with the hazard warning flasher in use you can activate the combination switch for the left or right turn signal in the usual manner - only the selected turn signal will operate. Upon canceling the turn signal, the hazard warning flasher will operate again. Make sure the ignition is switched on. With the vehicle at a standstill, depress the brake pedal and keep it pressed. Shift the automatic transmission into neutral position N. Release the brake pedal. If engaged, release the parking brake. Switch on the hazard warning flasher (Y page 102). Z is a malfunction in the power supply or in the vehicle's electrical system ! The vehicle may be towed only for distances up to 30 miles (50 km) and at a speed not to exceed 30 mph (50 km/h). 333