I have the KKL cable in which I do diagnostics with Multi ecu scan. But I was wondering which one would be the better one to have? KKl or ELM 327. I have also noticed that the KKL cable will not access certain parts of the ecu like the airbag or dashboard ecu. My question is, will the ELM 327 cable be able to access everything from the dashboard to airbag and dashboard and climate control etc? If not, what options do I have and what do I all needto be able to access all components?