2010 Mercedes GL-Class Owner's Manual - Page 332
2010 Mercedes GL-Class Manual
Page 332 highlights
330 Replacing bulbs Rear lamps Type : Backup lamp: P 21 W ; Rear foglamp (driver's side only): H 21 W Practical hints License plate lamps Type : License plate lamps: C 5 W Notes on bulb replacement ! Do not replace LEDs or bulbs not described in this section. You could otherwise damage the LEDs, the bulbs or parts of the vehicle. Only have the LEDs and bulbs replaced at an authorized MercedesBenz Center. ROnly use 12-volt bulbs of the same type and with the specified watt rating. RSwitch the lights off before changing a bulb to prevent short circuits. RAlways use a clean lint-free cloth when handling bulbs. RYour hands should be dry and free of oil and grease. RIf the newly installed bulb does not come on, contact an authorized Mercedes-Benz Center. i Mercedes-Benz recommends using Longlife (LL) bulbs. Replacing bulbs for front lamps Before you start to replace a bulb for a front lamp, do the following: X Switch off the ignition. X Turn the exterior lamp switch to position $. X Open the hood (Y page 228).