most likely the relay inside the antenna has fried.

If you want, you should be able to pry open the antenna housing, and directly jump the motor. I did that on my car before whent he relay was bad, I ended up finding a good used antenna for cheap.

You can also buy a hirschman universal antenna and install it and it will work fine, but I prefer the oem unit.

The cable fromt he antenna could be spliced with the other antenna, but I don;t recommend it, as it can cause reception problems in some cases.

I would check around and try toget a good used working antenna. Much better than going with a whip or concealed unit.

You can remove the antenna fromt he car, then open it up and see the wires for jumping the motor.

Regards,

Alon

__________________
'92 300CE - Sold
2004 C240 - 744 - C7 Wheels - Android Radio
2002 C320 - 816 - Sport Wagon - Sold
2006 E350 Wagon - 368 - Dead
2015 GL350 Bluetec - 197U