I appreciate what you're saying, and I'll keep from trying things before asking here. Got a little ahead of myself. I am learning a lot and would ideally like to continue.

For example. I've got the positive terminal in the engine area as well. Is there a specific order the new battery and leads should be connected in? Is the voltage I'm getting normal (11.8v then 13.6v at running)?

How can I clear the code and thus the trans fail-safe?

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02' X5 E53 3.0i Petrol (210k km/130k miles)
Will trade coding skills (Javascript, React, Node, Django, Mobile dev) for car knowledge
ODB II: ELM 327 (Torque Pro app)