aegea

Hi Guys:

I recently acquired this Brilliant Silver Metallic 2004 500SL AMG equipped with Keyless Go, and a working key fob with removable metal blade. The associated buttons on door handles and shifter knob do not work to open doors or start car. The dash messages are: Key Not Recognized, Key Do Not Forget. How do I use DAS or MB STAR Diagnostics to get keyless go functions to work, and to prevent dash messages?

A local Mercedes dealer’s service manager said there is no key card. I use the key fob.

I see some Benzbits .pdfs about keyless go; but don’t know how to do the DAS programming.

Dr. Plastic

Have you tried a new battery in the fob?

aegea

yes... good tip

matk

I have the same problem. 2005 car with Keyless Go and two keys that both previously worked fine including Keyless.

Both keys are now showing “key not recognised” in the dash and won’t work Keyless, but will still start the car via turning in the ignition slot.

I’ve already tried new batteries in both keys, with no solution

MikeJ65

Aegea - Are you sure that you have a keyless go key? Is it an all black key? If not, it is a replacement key that might not be a keyless go type. If it is a keyless go key, it is possible that it is on a key track other than the ones programmed in the keyless go module. You would have to check/program that with DAS.

Matk - There are a number of possibilities including bad keys, bad keyless go module, antenna issues, etc. DAS has a number of tests to check antennas, keys, etc.

aegea

That’s me too. It is annoying to see the messages. It would be nice to be able to open the doors by pushing the door handle buttons. I don’t care if pushing the button on the shifter starts the engine. Is that all the keyless go does?

My fairly new dealership’s service manager said a keycard is not used. Is that the transmitter key – A8/1?

I tried the Benzbits procedure: Transmitter key programming, function (benzbits.com) and could not get through the first step quoted below. When I press the shifter button, "Service required" does not appear on the instrument cluster. I don’t think my key fob is the Transmitter key A8/1.

FIRST STEP: “Press Keyless-Go start/stop button (S2/3) and hold for 3 s until the If second assignment of the transmitter key (A8/1) is also successful, note "Service required" appears on the instrument cluster (A1). The the operation is concluded with the message "Key in vehicle keyless go control unit (N69/5) then actuates the inductive antennas recognized" in the instrument cluster (A1). If the transmitter key is to for recognition of the transmitter keys (A8/1) in the vehicle.”

SHOULD I TRY: “Procedure when using spare key”? I don’t understand many of the terms.

aegea

Here is the key the hole in the wall dealer supplied. It is all black with a red button. What can I do with DAS?

g0rsq

The black button on the handle is only for keyless locking, and they often do not work due to damp getting into the micro-switch behind it.

Unlocking is done by a "capacitive" or "resistive" method by touching the rear of the door handle.

With a fully working keyless go system you can enter, drive, and leave the car without removing keys from your pocket.

aegea

thanks, so u don't have to have a card?

aegea

Does someone use keyless go without a card?... using the key fob?????????

g0rsq

Yes I do.

It will depend on age of car and region. I am in UK, with 2005 SL500 and both my keys are keyless go. No cards. They are the black plastic fobs (no "Panic" button ) If you open them up, you will see only one battery, due to lack of space due to keyless parts.

My system works fine, but both black buttons do not work to lock car. Button on boot (trunk) does work to lock the car though.

aegea

Thank you… so your black key is the keyless go type. I think mine is not, therefore DAS cannot program it to do keyless go functions.My key has the red panic button, 2 batteries, works as a remote control to lock and unlock doors; turns in the ignition “key” hole to start or turn off the car/ignition.

Note that the key fob does not open the trunk. There may be a malfunction with the key fob or circuitry. The trunk button on the door panel pops the trunk open. You don’t have to use the trunk handle.

IIRC The dealer said he could get me a keyless go key for about $550. There is no card available.

aegea

So, does everyone agree that the keyfob that came with my 2004 500SL IS NOT KEYLESS GO?

aegea

OOOOOPPPss… BIG MISTAKE… I was looking in my 2003 500SL key. My 2004 500SL keyfob is KR55WK47292 keyless go. It’s back to how do I program it with DAS?

It has the single battery.

aegea

Using DAS, in EIS Actual Values, I found the key last used in track 7; then in KG (Keyless Go), I assigned the track 7 key to track1. WHAT DO I DO NOW???

In KG, now I can find a keyless go key assigned to track 1; but the functions: open door by pulling door handle or lock by pushing door button or start car using the shifter button do not work. I can temporarily actuate door locks using Function 4 and open the locked door by pulling the handle. Once I start the car, turn it off, then lock it using the key fob the keyless go function open door no longer works.

Fault code B1371 The 24V antenna voltage in the on status is not within the tolerance range.: Undervoltage is found in KG. I erased the fault code.

I removed the key from the ignition, locked door with key(fob). Key still in vehicle was displayed on the dash. I pulled the door handle and the dash said Key not recognized! and door did not open.

I restarted the car and found no keyless go fault code.

Do I need to do an initial startup now?

aegea

WHAT NEXT??? The car sees the key inside the car. I assigned key 1 to the key last used in track 7. The keyless go functions don’t work. I think there is another step or 2 to go in DAS.