2011 Mercedes GL-Class Owner's Manual - Page 106
2011 Mercedes GL-Class Manual
Page 106 highlights
104 Seats Switching the seat heating on/off Switching on/off G Warning! Repeatedly setting the seat heating to level 3 may result in excessive seat temperatures. The health of passengers that have limited temperature sensitivity or a limited ability to react to excessively high temperatures may be affected or they may even suffer burn-like injuries. Therefore, do not use seat heating level 3 repeatedly. Seats, steering wheel and mirrors X Make sure that the key is in position 2 in the ignition lock. X Use switch : to move the thigh cushion into the desired position. X Press the W or X button to adjust the contour of the backrest to suit your back. X Press button ? to move the point of greatest backrest curvature downwards to the lumbar region and press button = to move it upwards to the upper back region. X Use button ; to adjust the side bolsters for optimal lateral support. The three red indicator lamps in the button indicate the heating level you have selected. i If the battery voltage is too low, the seat heating may switch off. One or several indicator lamps in the seat heating button flash. Adjusting the four-way lumbar support The lumbar support for the driver's seat can be individually adjusted to provide optimum support for your back. Driver's and front-passenger seat : To raise the backrest contour ; To soften the backrest contour = To lower the backrest contour ? To harden the backrest contour Rear compartment seats The system automatically switches down from level 3 to level 2 after approximately five minutes.