I never seen any power antenna wire to be any other color than blue, on any car I had, even after market radios have blue to be the power antenna.

Good luck I just put in a radio and a CD changer in my car. love it so far.

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1993 400SEL (W140) 281K
1999 S500 (W140) 163K (Sold)
2002 S500 (W220) 72K
1999 S500 (W140) 88K
You cannot simultaneously prevent and prepare for war.
Albert Einstein (1879 - 1955)