Mercedes-Benz EIS Diagnostic Service – No Start / Key Not Turning | Mail-In

This listing is for diagnostic evaluation only of a Mercedes-Benz EIS/EZS ignition module. This service is intended for vehicles experiencing no start, no crank, or key not turning issues.

This is NOT a guaranteed repair listing.

• Key does not turn in ignition

• No crank / no start

• Key recognized intermittently

• Steering lock issues related to EIS

• No communication with EIS module

• ✔️ Bench testing of your EIS/EZS module

• ✔️ Communication and authorization checks

• ✔️ Verification of key recognition

• ✔️ Determination of whether repair, key service, or replacement is required

After diagnosis, we will contact you with findings and available options.

1. Purchase this diagnostic service

2. Ship your EIS/EZS module to our shop

3. Include your order confirmation and a short description of symptoms

4. We perform diagnostic evaluation and contact you with results
   

5. Diagnostic service only – no repair included

6. Diagnostic fee is non-refundable

7. All-keys-lost situations may require additional services

8. Not compatible with FBS4 systems

9. Additional repairs or services quoted separately