2009 Mercedes SLR McLaren Owner's Manual - Page 372

Practical hints Batteries Charging with the battery charger Only use the battery charge unit approved by Mercedes-Benz and supplied with your vehicle. This charger is designed to automatically control the charge rate, and charge the battery or maintain the existing charge in the battery while the vehicle is parked and not being driven for long periods of time (on average approximately 3 weeks or more). Not driving the vehicle for such extended periods may cause the charge in the vehicle battery to drop. Using the charging point The charging point for the battery charger is located next to the CD-changer on the left-hand side in the trunk. Open the cover of the charging point 1. Connect the battery charger with the charging point 1. Observe and follow the separate operating instructions for the battery charger. Charge up the battery. The battery charger switches off automatically when the battery is sufficiently charged. 1 Charging point Remove the SmartKey from the starter switch. 372