1994 mercedes benz s500 w140 s500 w140

Question

I want to use a obd 2 scanner reader on a obd1 mercedes Benz if it will work recommend one to me . I am a descent mechanic but my first time owning a mercedes Benz.  I bought a 38 pin adapter now I need a reader scanner that Will cover abs,transmission ,all sensors,pse and things of that nature. Help!