I would look into the turn on lead fromt he radio tot he antenna. If no signal gets sent to the antenna, I don't think it would go up.

I had a simple solutiuion for mine, the relay ont he antenna motor brok, so it doesn't work anymore. hehe

Alon

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'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