See also:

Setting the side air vents
- To open/close: turn thumbwheel 3 up or down. ...

Tire pressure of at least 180 kPa (1.8 bar/26 psi) is not reached
If, after five minutes, a pressure of 180 kPa (1.8 bar/26 psi) has not been achieved: – Switch off the tire inflation compressor. – Unscrew the filler hose from the valve of the faulty tire. – ...

Additives
Do not use any additives in the engine oil. This could damage the engine. ...