Umairkhalid

Hi! So we bought this used w212, both the vanity mirror covers are broken from one side(both sides are mirror opposites of each shade, coincidentally) from where the cover broke, the hinges are extremely tight. Is there anyway to open the whole casing so that i could effectively join the broken pieces with super glue properly( doesnt fit nicely like this) or is there anyway to loosen the hinge and make it more free, as they have a very large pressure on them(which may have caused the break in the first place). And yes i really dont want to shell out money and get 2 new complete sets.