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 Owners Manual. Engine pre-heating
Fig. 128 The front left-hand side of the
bumper: cover ① and connecting socket ② for engine pre-heating
First read and observe the introductory information
and safety warnings For the engine pre-heating mode, the engine coolant is
heated slowly using a heating element while the vehicle ...
Volkswagen Touran Service Manual. Wheel, Balancing on Stationary Balancing Machine
Before beginning balancing, the following requirements must
be fulfilled.
The tire pressure must be OK.
The tire profile must not be worn on one side. The tire
profile must be at least 4 mm.
...