The switch which turns on the lights when the driver's door opens works just fine. The switch for the map lights does not work. There is a plastic cover over these switches and I would like t remove it to get at the bad switch, and also to see if the installer of the mobile phone speaker wire tapped into the map lights. How do I remove the cover over these switches without cracking it in half? Do I have to remove the rear-view mirror first? Thanks for the help.

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87 300e (white/black; amg body kit)
88 300ce (red/cream; amg body kit)
93 300ce cabrio (white/blue/blue top)
93 300ce cabrio (black/grey/black top)
98 ml 320 (totaled @ 137,000 miles)
99 clk320 (black/grey/black top)