2007 Mercedes GL-Class Owner's Manual - Page 204

Controls in detail Transfer case Transfer case ! Operational or performance test must only be conducted on a two-axle dynanometer. If such tests are necessary, contact an authorized Mercedes-Benz Light Truck Center. You could otherwise seriously damage the brake system or the transfer case which is not covered by the Mercedes-Benz Limited Warranty. operates automatically, ! Because the the engine and ignition must be shut off (SmartKey in starter switch position 0 or 1 or KEYLESS-GO* start/stop button in position 0 or 1) when testing the parking brake on a brake test dynamometer and such testing should be no longer than 10 seconds. ESP® Active braking action through the ESP® may otherwise seriously damage the brake system which is not covered by the Mercedes-Benz Limited Warranty. LOW RANGE mode* The LOW RANGE mode is available on vehicles with enhanced off-road package*. In the following situations you should switch to LOW RANGE mode: during off-road driving ( page 357) when crossing water ( page 362) when towing up or down on steep gradients With the LOW RANGE selected, the engine's power delivery and the shifting behavior of the automatic transmission are adjusted. Furthermore, the ABS, ESP® and 4-ETS functions especially adapted to off-road travel are activated. For information on driving safety systems during LOW RANGE mode, see "Driving safety systems" ( page 103). For more information on Off-road driving, see "Off-road driving" ( page 357). Gear Ranges There are two possible settings. HIGH RANGE LOW RANGE Road position for all normal driving situations. (LOW RANGE mode off) Off-road position for traveling on rough terrain. (LOW RANGE mode on) Also use the off-road position when driving on-road on steep gradients, especially when towing a trailer. LOW RANGE acts by raising the engine's gear ratio. The vehicle travels at roughly third the speed compared to when in the HIGH RANGE position, leading to an increase in the engine's drive power. i The vehicle is equipped with full-time four-wheel drive. Both the front and rear axles are powered at all times when the vehicle is being operated. 203