How can you tell if you have a heated or non-heated passenger mirror? Does it state that some where? I have mine apart and it has a 5 pin connector, but I don't see any heating components. 1989 300SE

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All W126.024 300SE original equipment MB (EPC) parts = exterior door mirrors list as electrically heated.

LEFT options are

MB# 126 810 45 16
and
MB# 126 810 13 21

RIGHT options are

MB# 126 810 76 16
and
MB# 126 810 10 21

NOTE:
The heating element is part of the mirror glass..







Have a great day.

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A nonheated mirror doesn't require any electrical connections directly to the glass.

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