Be sure you have removed the right screws; at least the two in the bottom are covered by little ovoid plugs which make them invisible until you uncover them. Pull on the box - not the lid of course - the box will stand quite a bit of force.
P.S. I HAD TO CLEAN AND REASSEMBLE THE DOOR DAMPER ASS'Y AND NOW THE DOOR GLIDES OPEN SOFTLY AND SILENTLY (Oops darn caps lock) it's a small bellows I used dry silicone to lube it.
RIP "Betsy" (Oo=*=oO)
'96 E 3 2 0 (W 2 1 0) M 1 0 4 (Totalled)
Spaces in sig so as not to screw up the SEARCH; every time someone searches for that MB they don't want my sig!
2004 Audi A8L
'98 VW Passat 1.8T 5M
'87 Alfa Romeo Milano 2.5L 5M
'67 Impala convertible, 327cid