Stevo,
The steering controls are pretty much identical across the range. I think the main difference is that the high-line equipped vehicles have a green wire instead of grey/red on the mid-line d2s.
Regardless, the wiring comes up to one of the ISO plugs at the back of the radio. The swi-ps install consists of connecting three wires from the swi-ps into the factory harness, and grounding the second wire from the steering controls. There is a mini jack that plugs straight into the remote socket on back of the sony head unit. If the installers are doing the install at the same time I'd be tempted to say that $80 install charge on top of the $150 for the interface is a bit of a gouge. If you know someone that is ok with car electrics/stereo installs I'd probably call in a beer favour tbh.
The mob I bought off don't seem to have any listed at the moment:
VORTEXAUDIOEXPRESS items - Get great deals on Pro Audio DJ Equipment, Speakers items on eBay Stores!
The swi-ps (the "ps" indicates it is designed for pioneer/sony head units) is a bit of a commodity item so my strategy would be to look for lowest combined purchase and shipping price, and then check that the sellers feedback is 99% or better. You can't really go wrong that way
swi-ps | eBay
Depending on what system you already have in the D2, the install could be anything from straight forward to mildly complicated. The high-line/harmon kardon systems with additional amp will require a bit of fiddling to adapt the pre-amp outputs to the harness for the amp, and in that case the charges look pretty reasonable.
If you have a mid-line system it's really just plug and play, with the possibility that they'd need to patch the power for the memory back-up. The aerpro ISO -> Sony harness I got from super cheap didn't have this wired in. Again if you can manage to wrangle a mate who knows what they are doing it's probably about 1 hour all up doing the head unit and swi-ps interface.
cheers
Paul
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