Not sure if it applies to MB alternators but many alternators self-destruct from the heat of overcharging. If your battery goes dead do your alternator a favor and charge your battery. If you jump the car and let the alternator charge a dead battery you are cooking your alternator. If you let your battery go dry you are cooking your alternator.

If you learn to break down an alternator and install new brushes/holder , bearings, diodes and regulator you can save bucks and stick with proven reliable components. When you buy a reman you never know where it has been.

The same basic story applies to starters minus the diodes and regulator, usually bushings instead of bearings.

The local alternator shop has proven to be my source of parts for starters and alternators.