Ray:

The four nuts will allow the top cover to come off, just remove the rubber blowby/air supply hose and lift cover off. No need to remove the intake hose, the bottom half stays put. If the bottom cover is loose, get now rubber mounts, there are three, on in front on the manifold, one at the rear on teh manifold side, and one in the middle on the fender side. They screw into the manifold, 10mm nut on top (or side).

Filter just unscrews, it's a spin-on. You will spill some oil, have a rag handy.

Take a vacuum cleaner and vacuum up all the leaves and crud that collects in the dirty side of the air filter housing, too!

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!