The aluminium fuse elements suffer from sacrificial corrosion or oxidation over time. At any dissimular metal contact points one metal will be either lower or higher on the electroylis scale. Copper to copper is much better. On that basis. Yes an aluminium fuse blown because of excess oxidation might be a be a precursor of other circuit fuses to follow. The only unknown is the time frame. The other fuses will be deteriouating to some extent as well is logical..

Rather than toss all the aluminium fuses. If you asked an electrician for a smidgeon of no corrode. Cleaned the ends of the fuses and fuse contact points. Applied a dash of the no corrode just might improve reliability to almost as good as using the copper fuses. This should stop further oxidation or reduce it to a totally inconsequencial rate. If nothing is done otherwise at some point that area will be problamatic. To save a few cents in production is not always a good ideal. Those aluminium fuses where never the best.

I am as guilty of ignoring this area till problamatic as anyone. The recommended sensible solution is to clean the fuse contact points.Replace all fuses with copper element ones. Watch for a deal on the copper fuse package and grab a set.

Otherwise a simular situation to the past bad period of aluminium house wiring remains. Although aluminium is still in common use here for the house enterance wires to the panel with no corrode on the terminations. Just a result of the high prices for copper now in comparison to aluminium.

Then we have another effect to consider. If dissimular corrosion is present a voltage drop may be occuring across it. This means reduced voltage to circuits. In many cases this will not matter much.

On some of the more modern diesels it could be a signifigant issue.. For example it would have been nice for a problem like this to have been responsible for low level dash illumination on 123s. Instead the lighting design was not quite adaquate for some of us. Saving energy was not in vogue at the time these cars were manufactured. Mercedes was just a little ahead of their time I guess.