1998 ML320, two cooling fans up front not working.

What is your question?

The cooling fans on my 1998 W163, ML320 work part of the time. Pulling the fuse and replacing after a few seconds was fixing the problem, but now that isn't helping anymore either. Air inside the car blows but not cold. turns to ice cold quickly when fans engage. not sure what to do at this point. Mechanic wants me to buy a new computer for the electrical systems. everything else seems to work fine on the vehicle, not sure if that's the best course of action. uses a 30 fuse, I have heard some people have upgraded the wires to use a 40 fuse. not sure how to do that or if that's what the issue is.

What makes this problem better or worse?

After engine is off for a while, pullign the fuse and putting it back in would restore power to the fans.

How long has your 1998 Mercedes-Benz ML320 had this problem?

about a month.