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HOMESERVICE MANUALSMERCEDES BENZ2006C350 4MATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTANTI-THEFT SYSTEMSANTI-THEFT & CENTRAL LOCKING -- 203 CHASSISBASIC KNOWLEDGECHECK DRIVE AUTHORIZATION, FUNCTION - GF80.57-P-3001S
2006 Mercedes Benz C350 4Matic

Check drive authorization, function - GF80.57-P-3001S

2006 Mercedes Benz C350 4MaticSECTION Check drive authorization, function - GF80.57-P-3001S

Model 215, 220 

Function 

After turning the transmitter key (A8/1) in the EIS control unit (N73) from position 1 to position 2, the ME-SFI control unit (N3/10) (on vehicles with gasoline engines) or the CDI control unit (N3/9) (only model 220 with diesel engines) are supplied with power. Following the encrypted data exchange between the

ME-SFI control unit (N3/10) or the CDI control unit (N3/9) and the EIS control unit (N73) the drive authorization code is calculated in parallel.

This calculation is then compared in the ME-SFI control unit (N3/10) or CDI control unit (N3/9)If verification is successful, the start authorization is issued. If the start-up is not enabled, this is stored in the DTC memory in the ME-SFI control unit (N3/10) or CDI control unit (N3/9). If the start authorization is given, the transmitter key receives an appropriate message via infrared from the electronic ignition switch control unit A8/1(N73).

  Transmitter key, task/design/function   GF80.57-P-4101S
  Electronic ignition switch control unit, location/task/design/function   GF80.57-P-4102S
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.