Loosen brass nut on top of primary filter adapter then holding nut unscrew the canister filter. Secondary filter, loosen hose clamps twist and remove filter. Fill the new canister filter with diesel prior to install. It might start then die. Restart it to purge air from secondary filter. Once running you will see a small bubble of air in the secondary filter, normal. Some people for some reason have a hard time restarting because of the air introduced in the fuel line. If thats the case, remove the air cleaner lid and spray WD40 thru the air intake while someone else cranks the engine over. Wash hands open beer!

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81 300CD (sold) 1972 280 SEL 4.5 (sold) 1966 250 S 4 spd (sold) 1974 450 SL (sold) 86 BMW 325ES (sold), 1973 280C (sold) 1988 300 SE.