Right next to the fuel pump, not far from the fuel tank and the rear axle. I don't remember, but I think it may be located on the right side.
fuel filter is located under panel on underside of vehicle -right rear
The fuel filter is located on the right rear underside of the car, just ahead of the rear axel area. You need to remove the cover to find it. It is the large canister next to the electric fuel pump.
The oil filter is located a the rear of the engine (top side) on the drivers side and is hidden by the air filter.
There is a filter screen on the outlet of the fuel tank. There is a filter mounted next to the fuel pumps under the car.
The 1989 Mercedes Benz 300E came equipped in a 3.0L L6 engine. It has a canister type fuel filter which will be located underneath the car and forward of the fuel tank in the fuel line. The OE replacement fuel filter is Fram #G3737.
It fits a 1986 to 1992 3.0 in-line six cylinder Mercedes-Benz 300e.
The relay is a black retangular box located between the battery and the firewall.
I have a 1993 300e and located a 30A flst fuse close to the battery, perhaps this helps Added: 1986-1989 is Fuse "A" 16 Amps.
Behind the right rear axle next to the fuel pump (under the car)
With hood open, it is located under the plastic grates and weather stripping on top of the drivers side of the cowl.
Located just left (looking into the engine) of the fuse box on driver's side. It is a canister type. Mr. G.
The fuel pump on a 1986 Mercedes-Benz 300E is located in the fuel tank. It is usually accessed by removing the rear seat and the access panel in the trunk area. Once the panel is removed, you can reach the fuel pump assembly for inspection or replacement. Be sure to disconnect the battery and take safety precautions when working with fuel systems.