i had the same problem i parked my old 318 and the gas went bad after 3 months " gas only last for 3 months before the additive desintigrate" i just flush the gas start it up with some starting fluid let it idle and all the problem is fixed. and i have an old 300e ussually you can tell if your car has an alarm if you look on the key. if you still have the original key the master should have a red dot on it on the handle to have a security system coz back then it was an option ob c class