Okay so don't laugh but I can't get the cover off of the rear dome light on my 1997 E420. I've applies a lot of force and it just won't pop off. So, what's the trick before I break the damn thing? Does it slide and THEN pull down or what??? (Sometimes German engineering and so damn frustrating)

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1973 280 - Sold
1980 300SD - Sold
1982 240D - Stolen
1988 300E - Sold
1989 260E - Sold
1989 560SEL
1994 E420 - Sold
1997 E420
2005 CL500