CALIFORNIA Models

1989 Mercedes Benz 420SELSECTION CALIFORNIA Models

Enter self diagnostics. See ENTERING SELF-DIAGNOSTICS  . Malfunction code will be indicated by number of blinks emitted from LED. Upon completion of blink impulse readout, LED remains on (does not blink). Press push button No. 2 again for 2 to 4 seconds. If another malfunction exists, it will be indicated at this time. If no other malfunction is detected, CIS-E control unit switches over to on-off ratio readout.

RENDER: 1.0x

NO RELATED

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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.