02 ML320 with 210K miles needs new alternator & serp belt. MB dealer quoted $1,400 parts and labor. Auto shop in city quotes me $800 and $1,000 depending on the alternator I need. What are the two possible alternators that I could need?

 

valeo or bosch. usually are the options

 

It depends on your VIN, Part # 010 154 81 02 chassis up to A319542 and Part # 011 154 91 02 from chassis A319543. Add suffix 80 to part no. for remanufactured alternators.