There are Three filters in a 1982 W123.....

There is one on the outlet of the fuel-tank.

There is the small plastic inline strainer-type filter in the fuel-line to the lift-pump.

There is the spin-on cannister type mounted by the side of the steering-pump....
(When changing this one, Make sure you replace the 'O' rings on the bolt too, and fill new filter with clean fuel to aid priming up after)

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Alastair AKA H.C.II South Wales, U.K. based member

W123, 1985 300TD Wagon, 256K,
-Most recent M.B. purchase, Cost-a-plenty, Gulps BioDiesel extravagantly, and I love it like an old dog.

W114, 1975 280E Custard Yellow,
-Great above decks needs chassis welding--Really will do it this year....