Autel G-BOX3 + IM508S Program Mercedes All Keys Lost Tutorial

This is a tutorial on how to program Mercedes-Benz all keys lost with Autel G-BOX3 & MaxiIM IM508S on bench. The procedure also works with Autel IM608 Pro2.


Check video to learn



Connect IM508S & XP400Pro via USB cable.

Connect G-BOX3 & IM508S via OBD cable.

Connect the jumper to the side of G-BOX3. The other end needs to be connected to Mercedes-Benz EIS according to wiring diagram.

We can check wiring diagram in IM508S:

IMMO >> Accept >> Mercedes-Benz >> Manual selection >> E >> GLK >> 2008-2014 >> Yes >> Control unit >> All keys lost(Fast) >> On bench(G-Box Fast) >> W209/2006-

Operating Steps

Power on G-BOX3 after successful connection.


Now we can start programming.


Please insert the blank key into the IR keyhole on XP400 Pro programmer.

Press “OK”.

This key is not an blank key, but it can be re-used after clearing. Press “OK” to use it.

Is there a key password? Yes

Here we have the password, enter a 16-digit key password.

Please insert the blank key into the IR keyhole on XP400 Pro programmer. Press “OK”.

Detecting key…

Writing key file…

All keys lost completed. After pressing OK, check if the new key can be used normally according to instructions.



  1. Insert the new key into the EIS.

If the red indicator lamp on the key lights up and goes off, the key learning is successful.

If the read indicator lamp stays lit, try inserting and removing the key for several times. It still not working, the key addition failed.

  1. Turn ignition on and check if the vehicle can be started normally. If the vehicle not started normally, the key addition failed.
  2. Check if remote lock and unlock functions can work normally. If not, please check if the key battery can work normally.

If the key battery works normally and the remote function is still invalid, the key addition failed.


The key is generated successfully.


Contact Info:


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