scan tool - reprogram chip ?
 

first off i have a 88 300se (w126, m103) and was wonder what people are using as the cheapest method to check for codes.. i have no idea if my car is obd I or if its obd II

also is there a way to tune your chip through a laptop ?

is there anything for that matter that i can do with a laptop for this car.. monitor, read, re-program

It's OBD I and no chip tune available, thus, you can't use a computer with it.

your thoughts on this ? will it work with any obd-II code reader ?

http://cgi.ebay.com/OBD-II-Interface-Adapter-Mercedes-Benz-38-OBD-OBD-I-2_W0QQitemZ220161213614QQihZ012QQcategoryZ60208QQcmdZViewItem

Unless you convert your mostly mechanical Bosch CIS fuel injection system to a true EFI system, then it's pretty much as "tuned" as it's going to be.