||My data needs are a little different, but they cover the same basic OBD data links in the Z32. I ran an Techtom MDM-100 Multi Display Monitor on my first TT Z32, and this is very similar.
The Scan Gauge drops into the OEM DIN Pocket slot, out of sight, but easily viewed, even in bright sunlight. It plugs into the LS PCM (OBD) port where the cable is routed through the bottom of the DIN Pocket, so it can be pulled out and even set on the dash for viewing from the engine bay.
Scan Gauge turns on and off with ignition, is selectable to any four (4) data links. I use water temp, intake air temp, ignition timing, and battery voltage. There fifteen data points in all, each easily toggled for screen view.