My 1978 300D seems to be missing the bolt that secures the adjustment track for the alternator. For the time being I've got a long piece of metal holding it together (hardly a permanent fix but it gets me by...for now). Can anyone tell me what size it is or where to get a replacement?

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1985 190D 2.2L 717.411 5-speed
1983 300D Euro OM617.950

There are two different types of bolts ... my 78 240D has this: http://www.allpartsexpress.com/item.wws?sku=MBZ082741&itempk=68162&mfr=Genuine&weight=0.25. I got it at the dealer for $16 I think. I couldn't tell you the PN off the top of my head, but I can try to look it up when I get home from work later.

The other type of adjustment bolt, which seems to be more common, is more expensive, and is L-shaped ... you can also find it on Fastlane and Allparts Express. Or at the dealer.

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1987 300D, arctic white/palomino--314,000 miles
1978 240D 4-speed, Euro Delivery, light ivory/bamboo--370,000 miles
2005 Jeep Liberty CRD Limited, light khaki/slate--140,000 miles
2018 Chevy Cruze diesel, 6-speed manual, satin steel metallic/kalahari--19,000 miles
1982 Peugeot 505 diesel, 4-speed manual, blue/blue, 130,000 miles
1995 S320, black/parchment--34,000 miles (Dad's car)

My adjustment bolt is fine, it's a mount bolt that secures the adjustment track. I can post a picture.

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1985 190D 2.2L 717.411 5-speed
1983 300D Euro OM617.950

Oh, sorry. I'd have to look at the bracket; I can't picture it.

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1987 300D, arctic white/palomino--314,000 miles
1978 240D 4-speed, Euro Delivery, light ivory/bamboo--370,000 miles
2005 Jeep Liberty CRD Limited, light khaki/slate--140,000 miles
2018 Chevy Cruze diesel, 6-speed manual, satin steel metallic/kalahari--19,000 miles
1982 Peugeot 505 diesel, 4-speed manual, blue/blue, 130,000 miles
1995 S320, black/parchment--34,000 miles (Dad's car)