If you’re a locksmith or auto key specialist facing an “all keys lost” job on a Mercedes Vito 2008 (W639), this guide is for you. I’ll walk you through the full process using the Xhorse VVDI toolchain – a reliable and efficient method we use daily. No guesswork, just clear steps.
Tools You Will Need:
Xhorse VVDI PROG Programmer – for reading the EIS data
Xhorse VVDI MB BGA Tool – for key programming
Xhorse Key Cutting Machine – for cutting the blade
BENZ HC08 Adapter Board – for W639 EIS reading
EIS Removal Tool Set
Lock Pick Set (optional, for non-destructive entry)
Step 1: Entry & Blade Decoding
- We started by gaining access to the vehicle using a lock pick. Once inside, we decoded the door lock to get the mechanical cut code.
- Decode result: Positions 1, 2, 3, 5.
- This code was sent to cut a new blade using the Xhorse Key Cutting Machine. Having a physical blade ready early speeds up the whole job.
Step 2: Removing the EIS (Ignition Switch)
With the door open, we targeted the EIS. Using a dedicated EIS removal tool, we accessed it through the dash tray – the easiest route on this model.
Tip: Handle the EIS carefully. It holds all the vehicle’s key data.
Step 3: Reading EIS Data with Xhorse VVDI PROG
Here’s where the VVDI PROG shines.
- Connect the EIS to the programmer using the BENZ HC08 Adapter Board.
- Read the switch data in seconds.
- Save the file securely.
This step extracts the vehicle’s “key fingerprint.” Without this data, you can’t program a new key.
Step 4: Preparing & Writing the Key with Xhorse VVDI MB
Next, we switched to the VVDI MB Tool.
- Upload the saved EIS file via the “Prepare Key File” function.
- The system generates individual key files – fast and cloud-based.
- Select the key slot (we used slot 8 for this client).
- Write the file to a blank Mercedes key.
The tool confirms everything: key number, SSD data, and usage counter. It’s all integrated and foolproof.
Step 5: Testing & Finishing Up
We reinstalled the EIS, reconnected all plugs, and tested the new key.
Result: The van started immediately – both the blade and transponder worked perfectly.
Why This Method is a Game-Changer
Using Xhorse VVDI PROG + VVDI MB turns a complex “all keys lost” job into a streamlined process:
- No diagnostics needed
- Fast reading and writing
- Reliable results
- Works on Vito, Sprinter, and similar Mercedes models
Get the Tools:
Ready to tackle Mercedes key jobs with confidence?
Visit www.vvdishop.com for full toolkits and bundles.









