Date registered: Dec 2002
Vehicle: 92 500SEL to 01 E320T current 2014 lexus LS460
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Quoted: 3 Post(s)
RE: LQQKING FOR NEW OR USED MBZ SMART KEY REMOTES, ANYONE!!!!!!!!!!!!!!!
Smart keys CAN NOT be reprogrammed! They have to be ordered and the factory keeps track of the codes. There are only 24 combination of codes for any car.
The computer has to be changed and it comes with a learning key. A remote is either orderd as a additional or eplacement. The additional uses the next code for that car, the replacement wipes the first one smart keys were intoduced with the very late 140s, and 210s. Typically two codes were used for the remotes, one code was used for the emergency key. The remote is infrared for the doors and inductive for the ignition, so if the remote battery goes bad you can still start the car. the replacement remote talks to the car and can take up to 45 minutes before it will start and keep the car running.
The only use for smart remotes is if you want to impress your friends and to use the housing as a replacement. Some lat 90s could be coded by the dealer, but I think it was activation not reprogramming. The aiming of the remote and turning on the ignition was to resync not recode, and there were different proceedures.
There is a 10 page document that discusses "smart key" disabling, clean install, and the role of the factory.