My "91" 190E 2.3L is losing power and hard to start. I had it to my local MB dealer and the mechanic regapped the spark plugs and said it should run ok. Since the trip to the garage I have gapped the plugs twice within 6 months. Each time I close the gap a little more (now at .024 ). The car ran fine for a while then after a few thousand miles started to miss and start hard. any ideas? coil? something in the distributor?
any help welcome