This concise guide explains how to perform an all-keys-lost procedure for a 2005 Mercedes-Benz E500 W211 EIS using the Xhorse VVDI Key Tool Plus on bench.
Required Tools & Equipment:
VVDI Key Tool Plus
Solderless EZS Adapter for W211 EIS (ST12)
Multi-Function Adapter (to connect to Key Tool Plus)
DB15 Cable
T15 Torx Screwdriver
New VVDI BE Key
Optional: Bench Test Setup
Step-by-Step Operation Guide:
1. Prepare the EIS (Electronic Ignition Switch)
(1) Use the T15 screwdriver to remove the two screws from the EIS unit.
(2) Carefully open the EIS housing.
2. Connect the Adapters
(1) Seat the opened EIS correctly into the solderless adapter, ensuring the pins align with the contact pads.
(2) Connect the DB15 cable from the Key Tool Plus to the solderless adapter.
(3) Use the multi-function adapter to connect the DB15 cable to the Key Tool Plus tablet.
3. Read EIS Data
(1) On the Key Tool Plus, navigate to: Prog >IMMO > BENZ
(2) Select the correct adapter option: EIZ-W211-ST12.
(3) Choose Read EEPROM. The tool will read and save the EIS data.
(4) Save the file with a recognizable name when prompted.
4. Prepare Key File
(1) Navigate to: IMMO > Benz >Select from system >Prepare Key File.
(2) Load the EEPROM file you just saved.
(3) The tool will display the security password. Confirm the process to generate a new key file.
(4) Save the prepared key file.
5. Program the New Key
(1) Go to: Read/Write Key >Read/Write Key via IR> Write BE Key
(2) Load the unused key file you created in the previous step.
(3) Insert the blank smartkey into the Key Tool Plus tablet.
(4) Execute the Write Key command. The tool will confirm when programming is successful.
6. Test the Key (Bench Test Recommended)
(1) Reassemble the EIS unit.
(2) For verification, connect the EIS to a bench testing platform with power.
(3) Insert the newly programmed key. Observe the key’s red light:
– The light may stay on initially. Remove and re-insert the key.
– A successful programming is confirmed when the red light turns off and you hear an internal lock click.
Conclusion
The EIS is now ready to be reinstalled in the vehicle. The solderless adapter method, using the Key Tool Plus, offers a fast and efficient way to obtain the password and program new keys for Mercedes W211 models, eliminating the need for soldering.
