See also:

Malfunction
Comfort Access may not function properly if it experiences interference from external sources such as mobile phones, metal objects, overhead power lines, transmission towers, etc. In this case, ...

Activating HDC
Press the button; the LED above the button lights up. ...

Check the tire inflation pressure regularly
Check and, if necessary, correct the tire inflation pressure, at least twice a month and before starting on a long trip. Low tire inflation pressure increases rolling resistance and thus raises ...