Autel IM608 Failed to Read Mercedes-Benz W215/W220 EIS Password – Solution

Problem
When using Autel IM608 + XP400 Pro, the tool can successfully read Mercedes-Benz W215/W220 EIS data but fails to calculate the password.

• Tried via CAN, K-line, with G-Box and without G-Box — still no success.
• Question: How can the password for this type of EIS be read?

Solution
Autel IM508/IM608 cannot read the password for W220/W215 EIS directly via tablet or G-Box.

On some W215 units, the password can only be obtained through EEPROM data reading on the board. If the EIS board contains two large 64-pin chips, one must be desoldered and read.

Method 1 – XP400 Pro (EEPROM Mode)
1.Disassemble the EIS:

• Remove the back cover.
• Unscrew the two bolts (note: they are different lengths; mixing them during reassembly can damage the processor).

2.Identify the Processor:

• Determine if your EZS/EIS has a single or dual processor.
• Some models use the Motorola MC9S chip.

3.Solder & Read Data:

• Use the W215 wiring diagram and solder wires to the board.
• On XP400 Pro, go to Immo → Mercedes-Benz → Chip Type → EEPROM Mode.
• Read the D-Flash data.

4.Extract Password:

• Upload the data in Expert Mode.
• Retrieve the password and generate the key file.

Method 2 – Alternative Tool

If Autel cannot handle the EIS type:

• Use another tool such as Xhorse Key Tool Plus with the EZS/EIS adapter.
• This setup can read passwords from W215 EIS successfully.

Example Case:

• Vehicle: 2005 Mercedes S430 (W220/W215)
• Processor: Motorola 4L40K
• Operations: Read & Write EEPROM + Flash — successful.