Bosch components can go at any time. They are built to the same lasting standards as Lucas used in Triumphs and MG's.
If you go to yellowpages.com and enter "alternator repair" and your zip it will list all the places in town and some out of town. There is one in Lake Forest that claims precision remanufacture of starters and altenators. If you take your alternator to a kragen, autozone, pepboys, baums, many of these places can bench check your alternator and tell you if it's bad, and what part of it is bad. Save you from spending coin on something that may not be bad, not that it was great to begin with
Dude thank you- I am sick of getting gouged from my mercedes dealer. I will follow your advice about it- i a going to find the alternator and take it in. Thank you.