Volkswagen Touran Owners Manual. Brake assist systems
First read and observe the introductory information
and safety warnings The brake assist systems ESP, ABS, BAS, TCS and EDL will
only function when the engine is running. They make a considerable contribution
to active driving safety.
Electronic stabilisation programme (ESP)
The ESP help ...
Volkswagen 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  
.
...