2006 Mercedes SL-Class Owner's Manual - Page 416

Practical hints Batteries Disconnecting the batteries Warning! G Warning! With a disconnected battery G The brake system requires electrical power to operate. A malfunction in the vehicle's power supply or electrical system may impair brake system operation and switch it into its emergency operation mode. The same applies if battery is disconnected. To brake, the driver must then apply significantly greater brake pedal pressure and depress the pedal much further to obtain the expected braking effect. If necessary, apply full pressure to the brake pedal. Brakes are only applied to the front wheels. Stopping distance is increased! Adjust your driving style accordingly. For more information, see "Electro-hydraulic brake system" ( page 88). ! Always disconnect the batteries in the order described below, even if you only want to charge the starter battery, for example. Otherwise the vehicle's electronics can be damaged. Make sure the gear selector lever is set to position P. Close the retractable hardtop ( page 195). Turn off the engine ( page 60). Turn off all electrical consumers. Remove the SmartKey from the starter switch. or Vehicles with KEYLESS-GO*: Open the driver's door. you will no longer be able to turn the SmartKey in the starter switch and pressing the KEYLESS-GO* start/stop button on the gear selector lever will have no effect the gear selector lever will remain locked in position P 415