2010 Mercedes GL-Class Owner's Manual - Page 336
2010 Mercedes GL-Class Manual
Page 336 highlights
334 Replacing wiper blades Correct headlamp adjustment is extremely important. High beam adjustments simultaneously aim the low beam. To check and readjust a headlamp, follow the steps described: X i If it is not possible to obtain a proper headlamp adjustment, have the system checked at an authorized Mercedes-Benz Center. Replacing wiper blades Safety notes G Warning! For safety reasons, switch off the wipers and remove the SmartKey from the starter switch (vehicles with KEYLESS-GO: Make sure the vehicle's on-board electronics have status 0) before replacing a wiper blade. Otherwise, the wiper motor could suddenly turn on and cause injury. Park the vehicle on a level surface 25 feet (7.6 m) from a vertical test screen or wall. X Make sure the vehicle has a normal tailgate load. X Switch on the low beam headlamps L. Practical hints If the beam does not show a beam pattern as indicated in the figure left, then follow the steps below: X Open the hood (Y page 228). G Warning! Wiper blades are components that are subject to wear and tear. Replace the wiper blades twice a year, preferably in the spring and fall. Otherwise the windows will not be wiped properly. As a result, you may not be able to observe surrounding traffic conditions and could cause an accident. The adjustment screws are located under the cover panel. X Insert a suitable tool into the openings in the panel cover. The direction of arrows = and ? indicate the angle in which the tool has to be inserted in oder to access the adjustment screws. X Always turn the adjustment screws equally for vertical adjustment until the headlamp is adjusted as shown in :. Turn clockwise for upward movement and counterclockwise for downward movement. Graduations: RScrew RScrew ! Never open the hood when a front wiper arm is folded forward. Hold on to the wiper when folding a wiper arm back. If released, the force of the impact from the tensioning spring could crack the windshield or the rear window. Do not allow a wiper arm to contact the windshield glass or the rear window without a wiper blade inserted. Mercedes-Benz recommends that you have this work carried out at an authorized Mercedes-Benz Center. X at arrow =: 0.67° pitch at arrow ?: 0.50° pitch X Remove the SmartKey from the starter switch. Make sure the vehicle's on-board electronics have status 0 (Y page 80). Vehicles with KEYLESS-GO: The left and right headlamps must be adjusted individually.
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