In WHunter's post...notice the expected safe life of the rubber hoses....and that is with proper brake fluid change out schedule... and delamination is mentioned....

http://www.peachparts.com/shopforum/diesel-discussion/296023-front-brakes-wont-bleed-even-vac.html

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1980 240d ,

chain elongation, cam marks reference:
http://www.peachparts.com/shopforum/showthread.php?threadid=10414

http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html

evap fin cleaning:

http://www.peachparts.com/shopforum/showthread.php?t=156207&highlight=evaporator

A/C thread

http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html