Last night the car ran really rough when I started it. I shut it off and it rab smooth again. This morning it just keeps cranking but doesn't come close to starting. Anyone have any tips as to what it could be?

Thanks

gas, low gas - fuel gauge - bad gas - when is the last time you filled tank

electrical, sensor - low battery - fuse - starter/alternator

clogged air filter

do lights work, is dash display capable of measuring oil, does tach move when ignition turned on

try starting with gear selector in neutral, check battery connections, check gas tank cap, check air filter, try a jump start - be careful call 1800-for- Mercedes a bad jump can damge many things

Everything seems normal. Gas is almost full,all gauges work and the oil level is full. I just went outside and it started! It seems to be a intermittent problem.