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