Loosen the belt tensioner to relieve belt tenion, then Remove the 17 mm bolts/ nuts on the regulator side of the alternator. I used a 1/2" drive ratchet with a 18" pipe for extra leverage. The tensioner bracket stays on the alternator and come out the bottom as an assembly.

Here's a thread with some pics.

http://www.peachparts.com/shopforum/showthread.php?t=285723

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85 300D turbo pristine w 157k when purchased 167,870 July 2025
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked