Evacuating and Charging Valve, Low Pressure Side
A/C Refrigerant High Pressure Switch -F23Volkswagen Touran Owners Manual. Warning lamps and indicator lamps
First read and observe the introductory
information and safety warnings 
Lit up
Possible cause
Correction
Engine oil level is too low.
Switch off the engine. Check the engine oil level  
.
...
Volkswagen Touran Owners Manual. Sealing and inflating tyres
First read and observe the introductory information
and safety warnings Sealing a tyre
Unscrew the cap from the tyre valve.
Use the valve insert extractor   to screw the valve insert out of the tyre
valve. Place the insert on a clean surface.
Shake the tyre filler bottle †...