Too weird, '96 E320 outside temp. sensor

I just got back from a trip and had my '96 E320 parked at the airport. When I started up I noticed that my outside temperature reading on the dash was missing. Got home and pulled the instrument cluster - all bulbs were good. Decided that the computer of display might be bad, but looked at the sensor on the front bumper and someone had cut the wire leading from the sensor - it was a very clean cut like diagonal cutters would make. There is enough wire left for me to splice the wires back together, but I can not find the other half of the wire that goes back to the computer or wherever.

Two questions:

1. Why would anyone bother to do this? They did not take the sensor with them. They did try steal the MB emblem off the truck and broke it.

1. Where does the wire from the sensor go? If I can trace it back I can run a wire between the two.

Thanks,

Don