2008 Mercedes R-Class Owner's Manual - Page 510

Practical hints Battery Step 8 (Disconnecting) Step 9 (Removing) Take out battery. Step 10 (Reinstalling) Insert battery into the well under the passenger seat. Carry out steps 7 through 1 in reverse order to completely reinstall the battery, ( page 508) to ( page 505). Step 11 (Reconnecting) If the battery has been removed, carry out step 10 ( page 509) before starting the connecting procedure. Open the driver's door. f Positive terminal with cover g Negative terminal Disconnect battery negative lead from negative terminal g. Make sure the negative lead does not come into contact with the positive lead. Remove the cover from positive terminal f. Disconnect battery positive lead from positive terminal f. Battery, shown removed for illustration Make sure the SmartKey is removed from the starter switch. Vehicles with KEYLESS-GO*: Make sure the vehicle's on-board electronics have status 0. With the driver's door opened, the vehicle's on-board electronics have status 0, same as SmartKey removed from the starter switch ( page 41). b Battery ventilation hose h Vent plug ! The battery, battery ventilation hose b, and vent plug h must always be securely installed when the vehicle is in operation. Carry out step 11 ( page 509) to reconnect the battery . 509