1996 E300D - My alternator is shot so I wanted to replace it with a larger one >90amp since I'll be putting a stereo system in the car including amplifiers & component speakers. I've read that you can get a 120amp alternator but I can't find any alternator parts online greater than 90amp for the 1996 E300D. Any thoughts or recommendations on other parts I should change out to help cover my power intensive stereo system would also be appreciated. I've been unsuccessful doing google search thus far for the alternator.

 

Larger (capacity) battery will help more then the alternator amperage. Also extra large electrolytic capacitor on power input of your amplifiers will decrease voltage drop.
90 Amps alternator should be strong enough for pretty large audio system.