Webasto Air Top 3500 ST Installation Instructions Manual page 26

Electrical connections
11.4. Control element connection
The wiring harness is prepared for connection to the control element.
Simply pull on connector housing to unplug the connector. The
connector housing can be locked (self-locking action) by simply pulling
on the wiring harness.
NOTE:
The fibre optic cable must be in contact with the rotary knob
NOTE:
As an option an external temperature sensor may be installed in the
passenger cabin (see page 46).
Fig. 27: Control element
58
Air Top 3500 ST / Air Top 5000 ST
Fig. 28: Installation of the control element
Fig. 29: Installation of the control element (incorrect)