Fig. 85 Heat-reflective windshield with communications window (blue shaded area).
Windshields made of insulating glass have a transparent metallic infrared-reflecting coating. There is an uncoated area (communications window) just above the inside rearview mirror ⇒ Fig. 85 . This serves as a communications window for transmitting signals to and from electronic components and accessories.
The uncoated area must not be blocked on the inside or outside or covered with stickers because this can cause the electronic components to malfunction.
Volkswagen Tiguan Service and Repair Manual > Wiring Harness and Connector Repairs: Vehicle Electrical System, General Repair Information
Caution
Follow the procedure in the repair manual when disconnecting and connecting
the battery.
WARNING
Some tools are supplied with a tool safety clip, which is slid over the tool
points after using the tool, in order to protect other workers from injuries and
tool points from damage.
Observe ...