Engine Performance problem
1989 Mercedes Benz 300e 6 cyl Two Wheel Drive Automatic 140000 miles

engine is very hard to start when cold ,tickle gas gently takes6/7 times to catch ,then idles very slowly until gradually building up to driveable, once warm the engine runs but is uneven when more gas is needed i.e hills . at the same time as this problem starting , the bulb out warning light on the dashboard came on though bulbs seem ok .have replaced new the following items since , spark plugs ,h.t leads ,distributor cap ,rotor arm ,fuel tempreture sensor ,fuel filter