84 190e won't start,strong gas smell out of tail pipe
 

i just got this mercedes its a 84 190E and it has been siting for a year and it wont start after i drove it the other day the car just turn off and now when i try start it theres a gas smell coming from the back of the car please help with this matter, and also i changed the plugs, i'm thinking it may be the catlicconverter,please help.