1997 mercedes not running on 1990 Mercedes-Benz 190E

car starts but has no power and will just move slow like an oxygen sensor out or injectors are bad . just got car and know nothing about it. car has not been driver for 2 years.where do i start

Asked by for the 1990 Mercedes-Benz 190E
seek a diag and insp from your mech or get a referal from a friend where to go.