Originally Posted by jwzimm
You might check out the RemoteKey+ as well. It simulates the alarm (chirps, LED in the mirror) and it also allows you to open and close your windows with the FOB as well as fold the mirrors (if you have that option).
If you're gonna spend all that $$ for the Remote Key, you might as well just get the factory alarm and actually HAVE a functioning alarm instead of a fake. The price is about the same.
You can already open windows/roof & fold mirrors from FOB from factory. Simple to code in to be able to close your windows/roof from FOB.
And no, there is no way to code horn to signal lock/unlock. Factory system that does this does not use the horn anyway - it uses the alarm system siren to sound a chirp - so no alarm system - no chirping.
And coding the alarm is simple to DIY, if you don't want to get involved with coding, find someone near you to do it - just make sure they really know what the hell they are doing or bad things can happen
Dealer will charge ~$300 to do coding of new alarm - they do not have the capabilities to code individual items as we are doing here - they actually have to update the entire car software at the same time - which could take a couple hrs of the car hooked up to the machine depending on whether it all goes thru the 1st time or not...