looking for a scanner/multiplexer
 

hi fellow members.
i'm looking for something to check all systems in my 2000 s430 (especially airmatic esp and bas). i need a multiplexer cables and software (carsoft?) i got a laptop with windows xp.
i've seen lots of multiplexers online but i don't know if they're any good. ex:
MB STAR C3 Programmer

or this:

MB Carsoft 7.4 Multiplexer

honestly i have no idea if that would do what i want. ex. scan airmatic system, find error #, fix it, erase errors. same with esp system bas etc.