After Mid-2000: You should not have the 20-pin DLC connector. You only need to hold the left odometer reset button while turning the key to position 1 (Accessory). Keep holding the button for 5 or so seconds until any of the following shows in the display: OIL SERVICE or INSPECTION with RESET or RE. Release the button and press it again for another 5 or so seconds until RESET or RE flash. While the display flashes, press the button one more time briefly. If done correctly, END SIA should show up for a few seconds. All done.

I know for a fact that it works on s54 powered cars, others... didn't check

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Andre

6.5 Jet X己 6MT