See also:

Locking the vehicle (mechanical key)
If the vehicle can no longer be locked with the SmartKey, use the mechanical key. - Open the driver's door. - Close the front-passenger door, the rear doors and the tailgate. - Press the lockin ...

Please bear the following in mind
For safety reasons, Mercedes-Benz recommends that you only use Tires and wheels which have been approved by Mercedes-Benz specifically for your vehicle. These tires have been specially adapt ...

Lowering the vehicle
  Turn the crank of the jack counterclockwise until the vehicle is once again standing firmly on the ground.   Place the jack to one side.   Tighten the wheel bolts evenly in a ...