MERCEDES · DTC LOOKUP
Mercedes W164 ML EIS failure — W164 M-Class EIS authentication failure
Mercedes diagnostic code. Below: what it means, common causes, symptoms, and the exact bench-programming fix path.
Common causes
- •Cabin moisture exposure
- •Aged EIS hardware
- •Donor EIS without proper cloning
Symptoms you'll see
- •Crank-no-start ML
- •Cluster shows EIS fault
- •"Service required" message
The fix path
Mercedes EIS Cloning ($250) — W164-compatible NEC or Renesas variant.
AML services that fix this
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Related diagnostic codes
U0001High Speed CAN Communication Bus ErrorSteering lock faultMercedes Electronic Steering Lock (ELV) failureEIS not reading keyMercedes EIS fails to authenticate inserted keyCrank-no-startEngine cranks normally but won't startP164BEngine Stop Detected — Immobilizer ActivatedMercedes W220 EIS failureW220 S-Class EIS authentication failureNot sure which service applies?
Text us your year/make/model + which scanner caught the code — we'll tell you exactly which module to ship and which service to pick.