I have full functionality. As I mentioned in another post, the only minor things I still need to work on are:
(i) the "My Car" graphic is showing a saloon rather than SW. I hope this can be sorted by installing the latest firmware for the RadioNav next time I visit the Alfa dealer; and
(ii) the RadioNav voice has some background interference. I think this is down to a wiring issue in the mini-ISO and will get the auto electrician that fitted the RadioNav for me to look at this.
I've looked for the speedo part number for you on Fiat Eper http://ricambi.l-automobile.com:7080...-1&WINDOW_ID=1
I can't find anything for your 1.9 JTDM. But the LHD (which I assume in Km/H) equivalent of the unit I fitted is 156092012 covering the 2.0 and 2.4 JTDMs (Ti spec). This part is under the Brera and Spider models, as is the RHD part I fitted (which was salvaged from a 159 SW so this part seems interchangeable across the 159/Brera/Spider). For some reason no part numbers are listed for the speedo for the 2010-11 MY 159.
I don't know for sure if this can be installed on a 1.9JTDM, but would think so. The B&M unit should be the same number, although my unit was factory set for the English language (although I believe you can rest the language in B&M - there are instructions for this/you can download language files on the B&M site if I recall).
Regarding front & back parking sensors, the graphic in the screen between the two counters can be enabled/disabled using Multiecuscan (which you will need to proxy-align everything). I've previously experimented myself with enabling the graphic on my car in the new speedo unit (although I only have rear sensors). So I don't think this will be an issue for you.
You will additionally need to fit a GPRS antenna and will need a FAKRA connector. If you PM me with your e-mail, I can send you the wiring diagram and adapter part numbers to do this - it's too large to post on here.
Any other questions, just ask.