To program keys for any FBS3 and higher Mercedes vehicle, including trucks, you need to first extract the EIS/EZS password. This can be done by following the instructions in sections 3.2 and 3.3 of this user manual. Once the password is extracted, you can use the “Key” button in FBS (DAS) manager to program the keys. There are two methods to extract the password:
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From a working key (only original MB Truck/Bus key): With this method, you will be prompted to insert the working key into the ignition and ZN103 ProTag programmer, and repeat the process several times until the password is extracted. Note that ZN103 does not support this procedure.
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If all keys are lost, the password can be extracted from the EIS/EZS using the ZN075 IR adapter. In this case, you need to place the IR adapter in the EIS/EZS and wait for the password to be extracted.
The “Key” button also includes other options such as “Disable key” (which disables a selected key) and the option to “emulate a key” for the truck using ZN075 for emergency start. This function can be useful when the truck needs to be moved and no keys are available.

When you click on the “Program key” button, the next step is to connect your ZN075 IR adapter. It is essential to insert the IR adapter into the EIS/EZS and then remove it. After that, you can choose to work with a working key or if all keys are lost. Please note that the ZN151 distribution box is mandatory for password extraction from the EZS/EIS to work with the fuse relay. On-screen instructions guide you on the necessary connections, and it is highly recommended that you pay attention to them. All connection sequences and instructions are displayed for your convenience.


Now, the extraction from a working key is faster than ALL KEYS LOST, and the average result is to be expected between 500 and 1500 extracts. The average result time is constantly reducing over time. In order to program a new key to any of the supported trucks, it is compulsory to use the TA69 Abrites IR truck key. No other key can be programmed with the Abrites FBS manager.
ZN103 PROTAG is also obligatory for truck key programming because it is equipped with a truck key IR slot where you can program the key and read the password from working keys.
Each EIS/EZS comes with 8 positions for keys, and the software automatically selects the first available position to program a key in.

