They're not welded in, but the headliner has to be removed to get at the bolts underneath that hold the rack down. Given the more pressing issues with "Belinda", I'd address virtually everything else before heading off into the Rockies. Hell, having a beat up rack on a long trip makes more sense - you won't have to worry about making it worse, and you'll have a replacement waiting when you return!

Try some silicone lubrication on the antennae while raising and lowering it to see if that frees it up enough to allow full travel.

__________________
Joel
1985 300td (sold)
1981 280SEL (4-speed)