i have heard two different things on this... which is true
i lost my smart key... the dealer ordered one for me, and i had to park the car in the garage for 1 hour with the key in the ignition so the car could program the key...
i then (same key) ran the key through the clothes washer, which shorted the key out... went to the dealer, they gave me a loaner car for 3 days, while they ordered a key with the VIN number from the factory...
__________________ 1990 190e 2.6 - SOLD 1998 ML320 - SOLD 2003 C320 Sport Coupe - SOLD
driver adaptive electronic 5 spd~C5 & C7 packages~alabaster white~ charcoal leather~pano roof~mb star shift ****
20% tint~bose~euro command system~disk changer~video adapter with dvd/tv/mp3~silverstars~airbox baffels removed
TEIN SuperStreet damper kit~AMG sways~18" staggered lorinser LM6 replicas~debadged~tinted tail lights and side markers
Netherlands chirp with panic 1998 C230 2003 C240 2003 CLK320 Coupe
I called a local dealer yesterday and they told me that they can REprogram ANY smart key with the same SEQUENCE for my car. They told me that the sequence makes this key compatible with my car and they CAN reprogram it. They said it will cost me one hour of labor which equated to $70. This, of course, does not cover the metal blade which is specifically cut for each car. I never use the blade anyways so I can get any blank and slide it into the housing to hook the key on my keyring.
I think Benz is making up this crap that the keys have to be ordered to match your VIN. If this key can be programmed then I am sure that it can be reprogrammed. The whole idea of technology today is to make things easier and reusable. The idea of this key having to be ordered from the factory is not easier for us or Benz. I would even bet that the microchip in the smartkey can be reprogrammed. Benz is probably saying this to cover up their security glitch with this new smartkey technology.
Sounds like you mean flash memory. EEPROM. Electrically-Erasable Programmable Read-Only Memory. That's memory which can easily be rewritten. Or possibly EPROM, Erasable Programmable Read-Only Memory, which can be erased with a special UV light. If Mercedes-Benz uses PROM for part of the key, Programmable Read-Only Memory, then no, it's write once and if you change your mind then you have to start with a blank chip. In reading the press kit, it appears that part of the SmartKey system is either EEPROM or EPROM, because the some of the codes on the key are changed each time the car is started. Having another part of the code on a PROM would lesson the odds of owners accidentally clearing a key. The challenge for Mercedes-Benz was to create a key that THEY could make, but could not be easily duplicated by anyone else. Personally, I'm neither defending nor condemning, just explaining.
8 total key tracks. 3 total keys per track so effectively you can use 24 keys before replacement of the EIS is required.
Key tracks one and two will be the keys supplied with your vehicle and support all of the memory functions, etc. Any key from track 3-8 is an additional key.
When you replace the key, new key is programmed for the vehicle at the PDC. Once you insert the new key into the EIS, The eis itself recognizes the new data and the led on the key will illuminate. The eis will then erase the entire remaining starts/codes from the replaced key so that the new one will be active. The first thing you will notice is that the key will turn in the ignition. If you are able to depress the brake and remove the shifter from park, it is complete. Some cars display, 'computing data' in the cluster.
A replacement "additional" key will most likely be the first key of the given track so it will almost program immediately. In some cases, replacements of original keys require connecting a charger b/c it takes so long. Also, on older 220's they recommended using das the switch on circuit 15 of the ESM.
The "green key" just personalizes a new EIS. Meaning at the time of install, it gives the EIS, once installed and powered all of the vehicle specific data/VIN info. Well, not all of it. Specific components are then coded using SDS.
Keyless go chip cards are a nightmare to get to program most of the time. I don't know what the issue is... software or what. The KG smartkeys are not so bad....
Alright, now I just don't know what the hell I'm talking about.
[MB]CRS has written everything correctly. I don't believe the dealer reprogrammed a used preprogrammed smartkey. I have done extensive research on this when i retrofitted my keyless go system and it is NOT possible.
YOU CANNOT REPROGRAM A SMART KEY!!!! I bought one off ebay under the impression it could be reprogramed, my service writer said it could be done, HOWEVER when I took the key to the dealership they were unable to link the key to the car. The power door locks and trunk...YES. But NO ignition! DO NOT BUY SMART KEYS OFF EBAY!! OR USED KEYS< THEY WILL NOT WORK. Thanks