From the pic of the back of the Alternator in Post #24 it did not look like a Bosch Alternator so I did some searching as Member several Years ago had a Motorola Alternator.

Below is the internet address and a Pic of an Alternator labled as Motorola alternator on a Mercedes-Benz diesel

Motorola alternator on a Mercedes-Benz diesel | Flickr - Photo Sharing!

The Ribbed Aluminum Plate either has the Regulator and Brushes or just the Brushes.

You can get parts for Motorola Alternators from NAPA.
Also there is a good chance it is a higher amperages than the Stock Alternator.

Attached Thumbnails

 

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84 300D, 82 Volvo 244Gl Diesel

LOL
You are exactly RIGHT!!! Just came from ANOTHER Auto Electric shop and he determined it is a "Motorola". Said they are not as common as the Bosch and could be $180ish to repair. I got a price from Bennett Auto of $90 w/lifetime wty. I think it is a re-man Bosch. It must be the Alt that is keeping the dash lights from coming on because he had me sit in the car and look at the dash while he did something with his tester and the lights came on bright as can be!!

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2006 Jetta TDI DSG 320k miles
1997 Ford F150 325k miles 4.2L V6 "Work Truck"
2008 Tundra 225k miles 5.7L
1982 240D.....sold
1984 300D...Totaled OUCH!
1985 300D Turbo 222k miles "Dos" sold to 79Mercy
1986 300SDL 98K miles "The Beater"....sold
1987 190E 2.3 16v Euro spec 115K miles....sold

I added this thread to my Old one on the Motorola Alternator as it has better pictures.

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84 300D, 82 Volvo 244Gl Diesel

Just found out, My AMAZING mechanic & friend Pierre has found me a Alternator!!

THANK YOU Pierre!!!

Hope to have this on soon!!

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2006 Jetta TDI DSG 320k miles
1997 Ford F150 325k miles 4.2L V6 "Work Truck"
2008 Tundra 225k miles 5.7L
1982 240D.....sold
1984 300D...Totaled OUCH!
1985 300D Turbo 222k miles "Dos" sold to 79Mercy
1986 300SDL 98K miles "The Beater"....sold
1987 190E 2.3 16v Euro spec 115K miles....sold