First read and observe the introductory information
and safety warnings
As a basic principle, the vehicle should not be tow-started. Use jump leads to start the engine instead .
For technical reasons, the following vehicles cannot be tow-started:
However, if the vehicle still has to be tow-started (manual gearbox):

NOTICE
Introduction
Notes on towingVolkswagen Touran Service Manual. Battery Charger -VAS5903- Maintenance Charging
Note
If the battery is discharged by an electrical consumer
during maintenance charging, the Battery Charger -VAS5903-
automatically supplies the appropriate charge.
Maintenance charging can be performed without time ...
Volkswagen Touran Service Manual. Battery, Charging
Requirements
WARNING
Batteries that have a light yellow visual indicator
do not have to be tested or charged. Jump starting must
not be used!
There is a risk ...