Where is the fuel filter on a 1988 Mercedes Benz 300 E?

Under Passengers side floor pan and its covered by a tin (usually black) splash cover. Remove screws (about 4) and slide cover off. U will c the filter and pump (and perhaps the fuel regulator depending on model) Remember to replace the 2 brass O ring seals also and remember it will leak petrol when U disconnect. Remove fuel pump relay (behind battery), crank over motor a good few times, and this will stop the leaking of the fuel which is under preassure