To my knowledge only the W126 cars had this feature. It's possible that it was only present on the post '87 cars as well, I know they made plenty of changes for the '88 model and I believe that was the year they updated the stereo. I had never thought of it, but it would be a really cool idea to wire up this feature on a newer car. I'd be pretty impressed with anyone who went to the trouble of doing this. If I actually used my antenna I know I'd be looking into it. Then again, I would be damned impressed if someone went to the trouble of figuring out how to install an antenna from a new MB in an older car, if it's even possible; I believe they're inside the glass on the rear window...? No more motor at all, and with a little bodywork and paint you could have a smooth rear fender