Electrical gremlins can be a true PITA to chase down.
Those issues can be made even more frustrating by a
less than stellar fuse, you know, repaired or aluminum
or just in general 20+ yrs old type fuses.
For those with a 'new to them' MB I heartily encourage
a full fuse change out to the greatly preferred copper/brass
over a ceramic fuse body type.
For those who over time have allowed non coppers to
appear for cost or time or or...your excuses are now moot.
Next of course where to get these gems for less than the
$1 to $2 each many shops want.
Ebay of course. Just got 60 ceramic fuses in with copper
elements for just under $10 delivered. 20 ea of all 3 colors.
Good price and parts were shipped fast by
european-discount-parts
Links go away quickly but he has been selling since 2002 so just
do a seller name search.
As you replace these, one at a time please, take a few extra seconds
with a cleaner like Tarnex to insure the fuse holder is in good contact
shape too.