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When I bought the SL55 five years ago it only came with one key. Figured it would not be very handy if I lost the only one I had, so I ordered one through the dealer. On top of the $570 I paid for the key, they wanted another $150+ to find out which key number I needed. I got my trusty SDS to tell me I had key #1, so its Key#2 that was missing. Key P/N A2307660306 arrived and the dealer wants another $150+ to program the car. Mechanically, the key works as it should, the doors open with the remote button, the key blade works and the car starts and shifts OK with the key in the ignition. The first Keyless-go key works and is recognized by SDS, but the new key is not sensed as a keyless-go. Pressing the start/stop button for three seconds as per WIS does not bring up any messages in the dash. EZS-Check all keys recognizes the new key as ‘key or key track 3’. Does this key have to be learned in the EZS module? I don’t want to overwrite something that will need the dealer ‘green key’.
I've been doing some research on this in SDS since this is not the first time I have heard of this problem. I have found notes mentioning teach-in of a key. The process is to insert the key into the EIS, but don't switch on the ignition. There shouuld be a message on the MFD stating "vehicle calculating" which can take several hours. Once that completes, you switch on the ignition and it's programmed/ Here are some docs I founf referring to this:
Thanks Rodney.https://mbworld.org/forums/images/smilies/bowdown.gif No luck on getting the transfer started, no messages from the MFD. Tried to use DAS to install the key in the EZS, basically using the same method, but the laptop battery went flat, closely followed by the car battery. Will try again with chargers.
I have figured out that no messages were showing up in the IC because Keyless-go had been set to "not installed" in the ICM to stop the "don't forget key" door chime. I now at least get "key not recognized" message, but the door chime is back...
I have figured out that no messages were showing up in the IC because Keyless-go had been set to "not installed" in the ICM to stop the "don't forget key" door chime. I now at least get "key not recognized" message, but the door chime is back...
This may be an issue, at least with not getting the "calculating" message on the MDF.
If I understand correctly, I think your situation may be normal. My car came with 2 keys, but only one is keyless-go. See the owner's manual. For my car, it shows that one key has a gray plastic latch and the other is black. The black one is designated key #1 and is for keyless-go, the other is #2 and does not operate the keyless-go feature.
Got it. Gave up on the learn mode after 3 ½ hours with no change. (as per "Program replacement keys" in DAS. The shifter lock was never released signalling a completed program) The trick was to use "key track assignment to a memory block number". I put Key #3 (the new one) to Key track #2, memory block 2. Clear as mud, but after this the new key was recognized by the keyless-go module and could be assigned in the KG unit.
I now have two operating keyless-go keys. This SDS saved half its cost with this one job.
OK, dredging up an old thread here...
Can someone post screen shots from DAS that illustrates "key track assignment to a memory block number"? I cannot find this in my DAS (C4, 2015) . Only assignment of a key to a track. My new key works for all non-keyless-go functions, but I get "key not recognized" when I try keyless go functions. I assigned it to track 2. My original key started working for keyless go functions when I assigned it to Track 1.
The 'put it in the ignition and wait' does not seem to be the solution. I never get a 'calculating' or any other new MFD display. 4 hours later, no change. What sign would the car give if it had been successful?
Just back from an epic 7500Km trip through Newfoundland and the Maritimes. The SL performed flawlessly and could put the top down most days so the weather was cooperating.
The key assignment to a memory block is done in the EZS (ignition) control unit. From the Main Groups panel, choose Control Units --> Body --> EZS --> Control Unit adaptations --> Key assignment to a memory block.
Just a bit of a proviso. This worked for me, but I really don't know what I'm doing. It may have been the Mars was over Jupiter, or I had the right colour socks on. You may not get similar results.
Sorry to dredge up an old thread, but I searched and did not find an answer to my question.
In any case, just picked up a brilliant silver metallic 2003 sl500 with 30k miles in beautiful condition. Car has keyless go option. However, the only way I can unlock the door by touching the sensor on the door handle is if I have the smart card on me. Ditto for keyless push button starting (on the top of the shifter). Only works if the smart card is present.
So, my question is this: Am I supposed to be able to unlock car and start car if I have the key fob (rather than the smart card) in my pocket? Obviously, I can unlock/lock the doors by pressing buttons on the fob and I can start the car by inserting the fob in the dash receptacle, but am I supposed to be able to unlock doors and start the car via the fob without taking the fob out of my pocket?
[QUOTE=OldGote;8160178]Sorry to dredge up an old thread, but I searched and did not find an answer to my question.
In any case, just picked up a brilliant silver metallic 2003 sl500 with 30k miles in beautiful condition. Car has keyless go option. However, the only way I can unlock the door by touching the sensor on the door handle is if I have the smart card on me. Ditto for keyless push button starting (on the top of the shifter). Only works if the smart card is present.
So, my question is this: Am I supposed to be able to unlock car and start car if I have the key fob (rather than the smart card) in my pocket? Obviously, I can unlock/lock the doors by pressing buttons on the fob and I can start the car by inserting the fob in the dash receptacle, but am I supposed to be able to unlock doors and start the car via the fob without taking the fob out of my pocket?
I would say 'maybe'. You did not mention the origin of the key fob. Did you buy it? If so, did you specify keyless go capability? They are available both ways. If it came with the car, you can open it and Google the part number on the inner assembly to determine if it is keyless go capable. If it is keyless go capable, then someone with a STAR system will need to help you assign it to a correct track.
Thanks for the replies. I did open the two fobs and they each have two batteries. My understanding is that this means they are keyless go compatible (?). If so, they I guess I need to get them programmed to talk to the car.
Well, popped into Mercedes Benz of Escondido today and service advisor (after consulting with "tech supervisor") advised me that Keyless Go only works with the Smart Card not with the key fobs.
Yes, it seems to be. I cross referenced that to FCC ID KR55WK47292. The manual submitted for FCC approval describes keyless go functions, and the PCB pics show all the keyless go components. https://fccid.io/KR55WK47292
If you have tried the various 'teach in' methods you will find in a Google search, and they did not work, you need to find someone with a Star system.
So I took my 2003 SL500 to the best local MBZ shop (Escondido German) and the tech there opened up my key fobs and advised me that the fobs which I have are not "keyless go." Instead, they are keyless entry (so confusing!). According to him, the keyless go fobs have a model number that ends in 9046 (not 3312 or 3313). He also said that the keyless go fob circuit boards have two little copper coils (versus only one on the non-keyless go model).
Can anyone who has replaced a keyless go fob on a 2003 SL500 confirm the correct part number? Thanks!
Did some more digging and this is my latest guess:
The 2003 R230 keyless go function only works via the smart cards, not via the key fobs. Apparently it was not until the 2004 model year that the keyless go system was designed to function with the key fobs.
There is a thread here on mbworld with one person who went berserk on this issue and upgraded the keyless go "computer" to the 2004 model and also purchased 2004+ fobs in order to have a keyless go system in his 2003 SL500 that worked with the fobs.
Again, I am sort of guessing here, but it seems like the 2003 R230 keyless go system only works via the smart cards. This would be consistent with what the tech at MBZ of Escondido told me.
Did some more digging and this is my latest guess:
The 2003 R230 keyless go function only works via the smart cards, not via the key fobs. Apparently it was not until the 2004 model year that the keyless go system was designed to function with the key fobs.
There is a thread here on mbworld with one person who went berserk on this issue and upgraded the keyless go "computer" to the 2004 model and also purchased 2004+ fobs in order to have a keyless go system in his 2003 SL500 that worked with the fobs.
Again, I am sort of guessing here, but it seems like the 2003 R230 keyless go system only works via the smart cards. This would be consistent with what the tech at MBZ of Escondido told me.
Hi, my first post, hope it's useful.
I think the above assumption about 2003 model year is wrong. I have a 2003 model SL500 R230 with keyless entry/go. It all works on keyfobs of which I have two, I don't have a smartcard. The keyfob circuit board has two copper coils, one on each side of the board. It's only got one battery.
With the key in my pocket I'm able to unlock the car by touching a door handle, start the car by pressing the start button on the gear stick, and lock the car by pressing the black button on a door handle.
Can't find anything that looks like a part number, but the keys are black plastic rather than the newer metal style.
Thanks, Danny and welcome to the forum. Wow, that's great that your fobs work Keyless Go. I think I read somewhere that perhaps some of the later-produced 2003 R230s were given the updated KG system in which the fobs allowed keyless entry and starting? Not sure about this though.
What is the manufacture date on your R230? My door jamb tag reflects manufacture date of June 2003, which would seem to be on the late end of the 2003 model year production so who knows.
I would love to know the part number for your fobs. On mine (also all black...no chrome), there is a white sticker on the pointy end of the chip (just above the batteries that says
"315 Mhz Siemens
5WK4 7282
5WK4 7283
FCC ID IYZ 3312
CAN 2701 103 2302
Made in Germany."
Since there had been 16 years of ownership before I acquired the car, it is certainly possible that one of the previous owners (likely unknowingly) replaced broken/malfunctioning fobs with the non-Keyless Go fobs.
Keyless Go question on my W220.175 (2003 facelift model).
Short version: Does a short-circuit in one of the sensors in a door disable Keyless Go?
Longer version: I’ve owned the car for 6 months and Keyless Go hasn’t worked in that time – same for the previous owner I understand. It has an error code “S48b1 (FR door capacitance sensor): short circuit to ground.” Given that this is associated with Keyless Go, I wonder if this could explain why it’s not working- in which case, I’m willing to take the chance to replace the door handle mechanism to see if that gets things working- but I want to check if that's a plausible solution before spending $$$. (Right now, if I approach the car with my key and pull the handle, the dash reads “key not recognized”. Both key fobs are single battery- which I understand means compatible with keyless go? The car came with the keyless go option [889]). [The other option is paying the dealer to check that the keys are programmed properly, I guess.]
Thanks, Dalplex, for your reply. I just checked and I get "key not recognised" on both sides. Also, if I press the engine start/stop on the end of the gear shift, I get the same message.
I've just talked to my mechanic and I might be able to rent a MB Star computer for a day to re-programme the keys - assuming that's necessary... if I was confident I could figure out how to do it!
To add to my "key not recognised" issue mentioned above, I've tried to diagnose the problem using my newly-acquired STAR C3 clone (not that I know what I'm doing). From the EZS/EIS module, the keys (both single battery, which I understand designates keyless go) are on tracks 6 and 7. On the Keyless Go module, I changed the keys to be consistent. But no dice. The switches on the door handles and top of the gear switch all seem to work according to STAR. But the keys are not recognised. The system can't locate the keys within the car either. The remote buttons on the keys work perfectly.
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