Here are the results for the codes I read on my 1993 400E:

PIN 7:
6. Starter lock-out/backup lamp switch.
11. Closed throttle recognition signal to engine control module (HFM-SFI or Left LH-SFI) Fuel safety shut-off to engine control module (HFM-SFI or left or right LH-SFI)

PIN 19:
4. Air injection system faulty hot film mass air flow sensor with hot wire.
17. Data exchange malfunction between individual control module.

PIN 30:
3. Driver Airbag squib

Now the question is what do these codes mean? I can tell that there is some problem with my Air Pump and possibly MAF...I would like to try to solve these problems so I can clear the codes and turn the Check Engine light off.

Thanks
-Landon

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• 1993 Mercedes-Benz 400E *146,000 Miles*
• 1985 Mercedes-Benz 300SD Turbo Diesel Biodiesel *SOLD @ 346,000 Miles*
• 1984 Mercedes-Benz 300D Turbo Diesel Biodiesel *SOLD @ 284,000 Miles*