2011 Mercedes GL-Class Owner's Manual - Page 278

276 X Stowage areas Ensure that clamping claw A sits flush against the inner edge of roof rail F. If necessary, adjust the span width of the crossbar (Y page 276). X Slightly tighten up bolts ? on both sides in a clockwise direction. X Tighten up bolts ? on the front and rear crossbars. Observe the tightening torque of 4 lb/ft (6 Nm) . Loading, stowing and features G Warning! Have the tightening torque checked after mounting the crossbars. The screws could come loose if they are not tightened to a torque of 4 lb-ft (6 Nm). X X ? Bolt for the clamping claw A Clamping claw G Bolts for adjusting the span width (2 per side) H Cover strip X Attach and lock protective caps ;. Stow the key and Allen key in the stowage compartment under the cargo compartment floor again (Y page 274). Setting the span width of the crossbars G Warning! Only install the crossbars at the exact locations designated on the roof rails. The designated locations for the front crossbars are between the markings engraved on the inside of the roof rails. The designated locations for the rear crossbars are between the gaps on the roof rails. Otherwise, the crossbars, mounted accessories and the objects attached to them could come loose from the vehicle causing an accident, thereby injuring you and other persons and/or causing damage to property, including damage to your vehicle. Pull cover strip H out of the groove until bolts G on both ends of the crossbar are visible. X Turn bolts G on both sides approximately two turns counterclockwise. X Align the crossbars on the marked positions on the roof rails. X Ensure that clamping claws A sit flush with the roof rails on both sides. If necessary, pull out or slide into clamping claws A. X Tighten bolts G. Observe the tightening torque of 4 lb/ft (6 Nm) . The width of the clamping claw is not set correctly. G Warning! The span width of the crossbars for your vehicle is set at the factory. The span widths only fit in the intended positions on the vehicle. Only install the crossbars at the marked positions and observe stickers = FRONT and REAR. Have the tightening torque checked after mounting the crossbars. The screws could come loose if they are not tightened to a torque of 4 lb-ft (6 Nm). X Press cover strip H piece by piece into the groove of the crossbar. X Install the crossbars as described (Y page 274).