Awhile back a friend gave ma a couple of used Bosch alternators that were cluttering his garage. One was a 55 amp unit that wound up being a replacement for the dying Pep-Boys rebuilt in my 240D.
The other was noticeably larger but had no factory Bosch label, just a decal from a local rebuilder.
Last week the 65 amp alternator in my '84 Euro 300TD died, with the charge-lamp remaining on when the engine was running. Inspection of the old regulator revealed badly worn brushes, but a new regulator didn't cure the problem. So I decided to install the larger Bosch unit. Of course, this alternator needed a different hookup to connect the B+ stud to the B+ at the starter. I used a 6-guage yard-tractor cable. Otherwise the alternator fit OK, once I discovered I needed to mount the upper adjuster-bracket to the alternator first, before installing it in the car. Even the belt worker out OK. Though, when I started the car, this 'new' alternator wouldn't charge either, but the new regulator saved my original 65-amp unit, fixed that.

A question - without the original Bosch label, is there any way to tell exactly what size alternator I've installed? I suspect it may have been left over from one of my friend's W107 380SL projects. I'm guessing it may be around 80 to 100 amps.

Happy Motoring, Mark

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DrDKW