I am looking to do this to my car but I am looking to see if anybody does this to there car and is it a low price way to do it? Any information or advice is very appreciated, thanks

 

I think you should to contact with dealer for upgrading the alarm system. I researched over internet but not find any authentic advice or pricing for this purpose. Moreover, I don't have experience of such upgrade as I am happy in the built-in alarm system.

 

Ok preciate it my boi, I like the built it alarm system.

 

Technically there are some items that you could add to the system in terms of sensors, but they would have to tie into current trigger setups. The question is what do you need to add or want to? Proximity/microwave detection sensors while cool can be a real pain in the ***, especially for those people using them to protect wheels as they set up the field so large that every time someone comes within 10' the alarm triggers. Glass breakage is nice and could be added easily. Remote start is a separate unit and if I recall you may loose one key fob to be kept in a small box under the dash so the ecu can see the key when remotely starting. As I recall, the car will remember three key fobs total in memory and cycles them through as you add them into memory.

 

That is not what I understand at all, please explain.

 

It's been years since I looked into it, and at the time there was some discussion that the skreem module had a limited number of keys it could maintain in its memory. It was said at the time this enabled MB to limit the number of available keys to a given car. It made sense, as they most likely have a limited number of key cuts across the production of VINs. The same theory applies to home door locks too, maybe 100 different cuts that can be matched up at the store to allow the "one key for all locks" scenario. For MB its a way to limit the number of individual keys floating around and enhances the "anti-theft" aspect. Gone in 60 seconds fans will remember the reference to laser cut keys. It would make sense to limit the number of key fob id codes since I would suspect most would assume a limited number of key holders per household, and a lost key could simply be deleted should that need to be done.

Again this was a long time ago, and may not have applied to the crossfire.

 

The way I see it is:
The secret of the key working is the chip in the fob. Each chip is coded to match the info locked into one particular cars memory. The chips access to the cars coding is via the transponder (halo) ring around the ignition key hole.

The physical key is matched to the cars tumblers in the ignition, and door locks etc.

The transmitters in each fob are all the same but are individually matched to the code required by that particular cars receiver to open or close the locks. This info is learned when the matching process is done for the first time or when new batteries are installed in the fob when too much time has elapsed and the memory of the fob is lost.

I imagine you could have an infinite number of keys made for a particular car as long as each chip was encoded with the associated VIN info and the physical keys were cut all the same. Every key that works on your car is a clone.

The physical keys appear to be cut with an end mill type cutter, they even show the machining marks, no laser cutting at all. Dealers like adding hi-tech words to their sales pitch, it makes the customer happier to spend their money.

This is what I imagine it to be, if I am wrong somewhere let me know.

 

You are close.
The security is two parts, the fob and a special code key in the skreem, think of it as the fob having the first 6 digits of a password and the skreem having the last 6. Together they make up a code via some algorithm that delivers the real code. So each fob has a different id code that needs to be learned. The system can't be expected to hold an unlimited number of fobs in memory so they limit that and cycle them through based on learned history. Cloning would be the answer because the car would not know the difference.