2009 Mercedes SLR McLaren Owner's Manual - Page 371

Practical hints Batteries Charging 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 87). Warning! G you will no longer be able to turn the SmartKey in the starter switch the gear selector lever will remain locked in park position P Never charge a battery while still installed in the vehicle unless the battery charge unit approved by Mercedes-Benz (supplied with your vehicle) is being used. Gases may escape during charging and cause explosions that may result in paint damage, corrosion or personal injury. A battery charge unit specially adapted for Mercedes-Benz vehicles and tested and approved by Mercedes-Benz is available, permitting the charging of the battery in its installed position. Contact an authorized Mercedes-Benz Center for information and availability. Charge battery in accordance with the separate operating instructions for the battery charger. You can obtain detailed information on charging the battery from your authorized Mercedes-Benz Center. 371