I have just bought a Passport SRX and was thinking about getting a carshop to install it for me, but i havent got a quote of less than $400. As a result, i have thought about installing the detector myself, but i wanted to get some insight from people on here who may have already done that. I have an Audi A4 just fyi. I have done some work on my car before so i am not completely new to messing about with cars and electronics, but my main concern is how hard is all the wiring from the display unit to the modual etc... any help would be very great, and installations guides (if they are out there) would do wonders. Thanks in advance!