I have installed a paddle shift steering wheel to my ATS Luxury (did not come with it). This is very easy to do, just remove the negative clamp on the battery in the trunk, wait 15 minutes, poke a 3-4 mm allen wrench into the holes on the back of either side to take off the air bag, unplug the connectors. The ATS uses a Torx bolt to hold the steering wheel in place. There is no way to install it wrong as there are slots for the wheel to go in. Less than a hours worth of work.
Does anyone know if the transmission requires reprogramming to recognize the paddle shifters or is there a replacement automatic shift knob that recognizes paddle shifters that is required?
On some of the BMW forums on this type of mod, there appears to be a wire loom that needs to be made and some mods to the wires on the automatic transmission.
Anyone that has access to wiring schematics for the ATS, I would be very grateful.