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Mercedes W220 EIS failure — W220 S-Class EIS authentication failure

Mercedes diagnostic code. Below: what it means, common causes, symptoms, and the exact bench-programming fix path.

Common causes

  • •Aged EIS hardware
  • •Key transponder pairing lost
  • •EIS internal cap failure

Symptoms you'll see

  • •Crank-no-start
  • •Cluster dark or partial
  • •Sometimes key not recognized

The fix path

Mercedes EIS Cloning ($250) supports W220 pre-NEC EIS. Send EIS + at least one working key (or all if AKL).

AML services that fix this

Mail in the affected module, we bench-program, ship back next business day. Flat pricing, return shipping included.

Mercedes EIS Cloning (Pre-2014)

$250

Clone a working Mercedes EIS to a replacement EIS — keeps your existing keys.

Service details

Mercedes Key Replacement via EIS

$150

Ship us your Mercedes EIS — we program a fresh working key directly on the bench.

Service details

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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 startAll keys lostNo working key for a European vehicleP164BEngine Stop Detected — Immobilizer Activated

Not 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.

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