Suddenly the 190E's tach and outside temperature readout do not work. Everyhting else works. Is this possibly a bad connection behind the gauge cluster?

Second, when checking the fuses, I found myself unable to remove the fuse box cover completely. I can of course get the front open but how does the rear come off? I tried to move the rear wire holding it but doesn't budge. Any suggestions? It is probably so obvious ....

Thank you in advance,

Haasman

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'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)