Installing wheel electronics

Every set of wheels or wheel change must be communicated to the control unit. In particular, this is necessary when wheel positions have been interchanged. For this purpose, always select the tyre type and tyre size under Main menu > Tyre pressure > Tyre type in the instrument cluster. The control unit then learns the wheel positions again while the vehicle is driving.

1. Clean the valve bore very carefully (visual inspection). 
   NOTE:

   When replacing the wheel electronics-

   • Always use a completely new valve  .
   • Always use a new fastening screw  .
2. Fit the wheel electronics unit loosely at the valve (do not tighten) and position it in the valve bore together with the new valve.
   NOTE:

   Counter the new valve with an assembly pin (supplied with the new valve.

   • The valve-stem seal may become twisted and can cause damage  .
3. Fit the washer, chamfered on both sides, from outside and screw on the union nut until it is seated correctly. Visibly screw in the bore at the valve foot and block it using the supplied assembly pin.

   Wheel electronics mounting 

4. Push wheel electronics -1-  slightly into the rim base (this adjusts the angle of inclination of valve to wheel electronics).

   Overview of wheel electronics 

   NOTE:

   When tightening the wheel electronics unit/valve, tighten to the specified tightening torque evenly and in one movement. The tightening process must not be interrupted.

   • Remove the assembly pin after tightening the components  .
5. Tighten self-locking (Torx) fastening screw to the specified tightening torque → Tightening torque: 4 Nm (3 ftlb.)  . The wheel electronics unit should now be lying evenly against the rim.
   NOTE:

   The wheel electronics must not come into contact with the tyre mounting paste or solvent.

   When mounting tyres, ensure absolute cleanliness around the wheel electronics unit.