How to turn off air suspension on mercedes gl450?

There is a towing button right above the rearview mirror, this button will turn off the air suspension on the Mercedes gl450. Note that it is not advised for You to drive with the suspension turned off. You run the risk of damaging the underside of the car due to lower ground clearance. You will also have a very loose and floaty steering wheel. This can make for imprecise turns or late turns. While it is not illegal to drive this way there is no benefit for having the system off, while it has a large number of drawbacks.