Becker Sat Nav

[sek]

I'm considering replacing my CDR 32 with one of the Becker nav units. Is this as simple as plugging in and installing the gps antenna, or are there other connections? Looks like there is a connection to the reverse switch and speedo on the nav units. Are those already connected to CDR 32? Car is an '01 TT with 6 CD changer and DSP amplifier.