Thanks to the posts in the following two threads, I was able to upgrade my alternator to a 143 amp unit from a 1997 S420. If one of you is ever going to swap out your 70Amp alternator, I would strongly suggest reading through these threads as there is a great deal of very good info:
http://www.peachparts.com/shopforum/showthread.php?t=123957&highlight=80a
http://www.peachparts.com/shopforum/showthread.php?postid=444946
I bought my used 143 Amp unit from Ptomac - http://mbpartsonline.com/
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1986 300E (3/2002) Rear ended and totaled (10/2009)
2000 Xterra (5/2000)
1992 400E (11/2009) -Sold
1986 300E (12/2009) - Sold
2004 E500 Wagon (6/2013) - Sold
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