SL/R230: Key Fob and push to start button
Thread Starter
Newbie
Joined: Oct 2019
Posts: 1
Likes: 0
From: Lincoln, NE
2007 550SL
Key Fob and push to start button
The key fob lock and unlock buttons work fine, but the doors will not unlock by pushing the button on the handle, also the push to start button does not work, no lights light up on the cluster the key fob light lights up when you push the button on the fob. The car starts fine when the key is inserted into the slot on the dash. Also the key not detected on the dash light comes on.
Member
Joined: Sep 2019
Posts: 230
Likes: 87
From: Northwich
R230 350SL
Has the key you are using previously worked with Keyless Go? Do you have another key that does work the Keyless Go?
The error message "key not detected" indicates the key and Keyless Go system are not communicating, i.e the Keyless Go hardware is probably OK but the key is not being recognised.
I recently bought a brand new extra key from a Mercedes Main Dealer and specifically asked beforehand if anything further was required and was assured the key would work everything "out of the box". When the new key arrived I had exactly the same as you describe. Key remote locks/unlocks the car using the remote buttons and key will start the car via the slot in the dash. My dealer looked into it and found that the car ECU has a number of "Key Tracks" and each "Key Track" can have more than one key located to it. However....... for Keyless Go system each track will only work for one key. Turns out my new Key came from the factory, preset to the same track on my car as my original key.
They reprogrammed one of the Keys to another track in the ECU and now everything works fine.
The error message "key not detected" indicates the key and Keyless Go system are not communicating, i.e the Keyless Go hardware is probably OK but the key is not being recognised.
I recently bought a brand new extra key from a Mercedes Main Dealer and specifically asked beforehand if anything further was required and was assured the key would work everything "out of the box". When the new key arrived I had exactly the same as you describe. Key remote locks/unlocks the car using the remote buttons and key will start the car via the slot in the dash. My dealer looked into it and found that the car ECU has a number of "Key Tracks" and each "Key Track" can have more than one key located to it. However....... for Keyless Go system each track will only work for one key. Turns out my new Key came from the factory, preset to the same track on my car as my original key.
They reprogrammed one of the Keys to another track in the ECU and now everything works fine.
