Hi my name is sheri martis, I drive a 1997 E420 its cold where i live and i was wondering what is going on with my car. I havent drove it in a week or two, but i wentg to start it today and it was ok for the first 5 minutes then it started to putt like it wasnt recieving gas, and also bang sounds came from the muffler i believe does anyone one know what i should do thank you.. Sheri Martis

one of the spark plugs has gas fouled and is hitting and missing causing a gas popping in the exhaust if at the time its doing it you will notice a hesitation or stumble and than clear up - finding it is the real thing so i would swap out the plugs with Bosch plat 4 iridium about 6 /7 bucks each they dont need to be gapped and they will let it run better than it has its a win win - jz

i would also put a can of sea foam in the fuel tank you might have some delivery issues and that might clear it up -