i have just ordered a scan gauge 11 for the gen 3 mini as it has specific firmware for our cars.
the thing that sold it to me is that you can now monitor air fuel ratio which is handy if using a tune on the car,
this is what it can do
Engine Oil Temperature
Engine Oil Pressure
Fuel Tank Level (Gallons)
Fuel Rail Pressure
Electric Fan Duty Cycle
Air to Fuel Ratio
Transmission Fluid Temperature 1 (Automatic Transmissions Only)
Transmission Fluid Temperature 2 (Automatic Transmissions Only)
Transmission Input Speed (Automatic Transmissions Only)
Transmission Output Speed (Automatic Transmissions Only)
Torque (Automatic Transmissions Only)
It can do all of that and more. I removed my SG II from my R56 before trading it and sent the gauge back to the manufacturer. They updated it with the Gen 3 programming at no charge. All it cost was postage to send it to them. Updates and return postage was covered by the manufacturer. Can't beat that for customer service.