This chapter contains information on the following subjects:
→ Warning lamp and coolant temperature display
→ Coolant specification→ Checking coolant level and refilling coolant
Never carry out any work on the engine coolant system if you are not familiar with the necessary procedures and if only unsuitable tools as well as incorrect operating equipment and fluids are available ! Have the work carried out by a qualified workshop if you are uncertain. Volkswagen recommends using a Volkswagen dealership for this purpose.
Serious injuries can be caused if work is carried out incorrectly.
Additional information and warnings:

WARNING
Coolant and coolant additives can pollute the environment. Spilt operating fluids must be collected and disposed of properly and with respect for the environment.
Coolant
Warning lamp and coolant temperature displayVolkswagen Touran Service Manual. Current Draw Test
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 of explosion during testing,
...
Volkswagen Touran Service Manual. Refrigerant Oil
Refrigerant oil mixes with the refrigerant (about 20 - 40%,
depending on compressor type and amount of refrigerant) and
circulates constantly in the system, lubricating the moving
parts.
Special synthetic refrigerant oils, for example,
...