2008 Mercedes R-Class Owner's Manual - Page 507

Practical hints Battery i If the vehicle battery is discharged and you had the vehicle jump started: Leave the engine running. Complete step 1, starting with switching off all electrical consumers. Continue with step 2. When the font passenger seat is in the most forward position, turn off the engine. Step 2 (Disconnecting) Switch off all electrical consumers. Read and observe safety instructions and precautions ( page 503). Open the front passenger door. 3 Battery cover mounting nuts 1 Seat rail cover, front right 2 Seat rail cover, front left Pull off right seat rail cover 1 in direction of arrow. Pull left seat rail cover 2 in direction of arrow as far as it will go. Left seat rail cover 2 cannot be removed. Using a 6 mm T-handle hex key (not supplied with vehicle) with a minimum shaft length of 12 in (30 cm), unfasten and remove battery cover mounting nuts 3 located at the floor carpet perforation. Move the front passenger seat to the most forward position ( page 45). i Open doors only when conditions are safe to do so. Move the front passenger seat to the most rearward position ( page 45). 506