2007 Mercedes S-Class Owner's Manual - Page 637
2007 Mercedes S-Class Manual
Page 637 highlights
Practical hints Batteries Do not rub the battery with rags or cloths. The battery could explode if touched due to electrostatic charge or due to spark formation. i Remove SmartKey from starter switch (vehi- Disconnecting starter battery cles with KEYLESS-GO*: Make sure the vehicle's on-board electronics have status 0) ( page 315) when you turn off the engine and no longer require any electrical consumers. The vehicle then uses very little power and the consumer battery is spared. ! Always disconnect the starter battery in the order described below. You could otherwise damage the vehicle's electronics. ! Switch off the engine and switch off the vehicle's internal electrical functions ( page 637) before you disconnect or remove the battery's terminal clamps. You could otherwise destroy electronic assemblies such as the generator. Have the battery checked regularly by an authorized Mercedes-Benz Center. Refer to Maintenance Booklet for maintenance intervals or contact an authorized Mercedes-Benz Center for further information. ! Switch off the vehicle's internal electrical functions before disconnecting the starter battery. If the vehicle is stationary for more than one hour with the SmartKey removed, you do not need to switch off the vehicle's internal electrical functions. ! Do not connect any consumers directly to the starter battery. The starter battery will otherwise be discharged. tery recommended by Mercedes-Benz. The consumer battery is installed in the trunk in such a way that it is safeguarded as much as possible against mechanical destruction in the event of an accident. Starter battery (example illustration from S 550) i Only replace a discharged battery with a bat- 1 Negative terminal 2 Positive terminal i If the consumer battery is discharged, you must use the mechanical key to unlock the vehicle ( page 614). Since the vehicle has a separate starter battery, however, you can still start the vehicle. 636