I have a 2011 500 TA and I am upgrading the HU (to a jvc kdr901) and I was wondering what I might lose from the current factory setup. The HU supports bluetooth and I can hook my iphone to it and with its handsfree kit all I seem to lose is the use of the handset button on the steering wheel which gets transferred to the HU, but what about eco:drive? is there anything else I have missed?