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I'm sure you really meant pin 3 not 2:
pin 3 - CIS-E (fuel injection)
pin 6 - SRS
pin 7 - A/C (HVAC)
pin 14 - MAS engine control
Not entirely sure how to access codes from the 9 pin, but I know you need a multimeter with a duty cycle function.
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Daily Driver: 02 E430 4MATIC
In the family: '03 E500 // '04 ML500 // 64 220SE
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