this is not easy, you have to break it!!! dont worry it won't be permanent. first, pull the whole mount out of the roof of the car(evenly!)the screws mounted in it you can't get there from here. second, depress the spring in the whole assembally and remove the pins in the roof assembally. third, you can mount the roof assembally with original screws. ( if those screws are too loose use lager sheet metal screws.) forth, replace the spring and pins in the mirror assembally and add a little wd40 and it will slide right in easier than it looks. ( i've done this in the dark once) these mirrors are only supposed to be installed once but it can be done.
feel free to e-mail me if you have any questions.
good luck!
adam

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Current Stable:
01 ML55 AMG
92 500E (a few mods)
87 300E (lots of mods)
00 Chevy 3500HD Diesel Box Truck
68 18' Donzi Marine
06 GT i-Drive7 1.0 Mountain Bike (with GPS!)

PREVIOUSLY OWNED:83 300SD, 87 420SEL, 88 420SEL, 90 420SEL, 86 560SEL, 86 190E 2.3-16V AMG, 94 E320