Newbie introduction

[OeschJ]

Good day all and hello from Saskatchewan Canada.
Purchased myself a 06 4.4i yesterday with 168,000 kms on it.
Needs some love and care ( Ac recharge, tires, misfire codes, goodies).
Been scanning through the pages and everyone here seems helpful and mostly considerate for new owners.
I am a journeyman electrician by trade, but now work mechanical and logistics with trains ( weird jump I know).
Always been mechanically inclined, and after owning various SUV's ( Ford Explorer, Mercedes ML 430, Nissan Pathfinder) I find it very rare that I'm taking my vehicles to an Indy or dealer.

They being said this BMW is a whole different game. Codes seem very vehicle specific as do the reset procedures ( I need a scanner to replace a battery??).

Looking forward to hearing from you all, I was quite active on the Mercedes forum when I had that vehicle.

I'm sure you're all wondering " ok, get to the first question" and here it is:
I have every component in the spare tire area for air ride suspension.... But no buttons to control it.
According to the manual I should have a controller to the left of the steering wheel.
Thoughts?