Mystery button

[Fightingapple]

I have recently bought an ML 300 blue efficiency and was wondering what the button does that has a picture of a car going along a wavy line (Near the hill decent button). When I push it a picture of a car comes up on the dash and the digital speedo moves to a different place! Obviously that cannot be all that happens so any advice would be much appreciated.

 

[stwat]

Hi.

Do you have the manual? It will tell you in there.

 

[grober]

It activates de-activates the off road program.

Vehicles with the AIRMATIC package. The off-road program assists you in driving off-road. Press off-road program button 1 to activate. Indicator lamp 2 lights up and the off-road symbol appears in the multifunction display.

Note: Do not use the off-road program on roads that are snow-covered or icy, or if you have fitted your vehicle with snow chains.

Select off-road program 1 for easily negotiable off-road terrain, e.g. for gravel or sand surfaces or tracks. The engine's torque is restricted to a limited degree and the drive wheels can spin. The spinning of the wheels results in a cutting action for better traction.
You can only activate off-road program 1 when driving at speeds below 100 km/h. The Drive program OFFROAD 1 Max. speed 100 km/h message appears in the multifunction display.
off-road level 2 is set and the vehicle is raised by +60 mm compared to the highway level.
DSR is switched on.
the differential lock is closed.

level 2 implementation may depend on certain equipment being fitted. ( ON&OFFROAD package)