Why? You're better off changing all the fuses every 10 years. For some reason this type of fuse deteriorates over time and small cracks form in the conductor. The fuse looks okay but it's not letting current flow. Pull it out and it falls apart in your hand.

At less than $5, it's cheap insurance. I think I replaced the fuses in my 3 126s for under $10.

Sixto
95 S420
91 300SE
87 300SDL
83 300SD