• Running gear
• Body
• Power unit
• Power transmission
• Vehicle electrics
• Heating, ventilation, air conditioning system
• Additional heater
• Self diagnosis, V.A.G Inspection Service
• Additional heater self-diagnosis
• Performing self-diagnosis
• Interrogating fault memory
• Additional heater fault table
• Additional heater final control diagnosis
• Additional heater basic setting
• Erasing fault memory, ending output
• Encoding additional heater
• Reading measured value block
• Adaption of auxiliary/additional heater
• Electrical check of additional heater
• Additional heater functional sequence
• Aux. heater/heater booster
• Air conditioner with refrigerant R134a
• Heating, air conditioning system