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MB W221 with a dead EIS questions.
26-01-2026, 01:34 AM,
Post: #1
MB W221 with a dead EIS questions.
Hi everybody, in this Benz the EIS is totally dead, is it possible to adapt a used EIS? Vehicle still has a working key.
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26-01-2026, 07:52 AM,
Post: #2
RE: MB W221 with a dead EIS questions.
Yes but you will need new key . Even if you have ori key
you cant extract pass from the key without EIS.
-Read FBS data from ECU save
-read SSID from ori key
-Read spare FBS data and pass of EIS save
-Read coding of spare EIS save
-Reset EIS
-Load data from saved ECU , enter SSID from ori key generate random pass , adapt EIS
-Write coding (write ori VIN now)
- Activate EIS
And finaly make new key from new FBS data.

If  I helped you press magic buttons  clapping
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