Genuine heated seat wiring loom removed from a 2002 Beetle highline, the harness is the same as other VW group vehicles of this era ( mk4 golf, bora, etc. ) but the heated seat switches are specific to the beetle. Retro fit loom, genuine.

Wiring Notes

Brown - Ground 
Blue/Grey - Dash Illumination
Blue/Black - 5A 12V Switched Ignition
Red/Black - Fuse 44 10A

There is a source close to where the wires are cut and those signals can be taken from the wires which plug into the heater control interface.

I am not responsible for installation.