I just put a new head unit in my '87 300E last night. (Thanks in no small part to all the articles here... Wow, what a mess the fader makes...) All the speakers are working fine, it powers up as it should, presets are saved, etc. My problem is the antenna doesn't go up when the unit powers up... The ant. switch also doesn't work...

Any thoughts on what I might have done? Or what to check?

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Ty H.
'87 300E 135K Miles

I'm about to embark on the same project shortly, and was curious how long it took you? And did you rewire all the speakers, or just the back? How do the stock speakers sound with an Aftermarket HU. Sorry I couldn't answer your question yet.
Mark

Did you check the fuse for the antenna ?

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Saumil S. Patel

Also, you are sure that you did not forget to connect the antenna control wire at the back of the radio, this signal is necessary for the antenna switch and the antenna controller to work.

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Saumil S. Patel