Okay, I came across these directions today to disable the seatbelt chime (Thank you to whoever posted the original instructions). I tried it as soon as I got home from work, and it worked. You will need the help of an assistant, unless you are coordinated:
-Get in and shut all the doors.
-Do not touch anything, even the brake, simply turn the key to the ON position (don't start the car)
-Change the ODO/Trip meter to ODO.
-Turn the key to off for a few seconds, then back ON again (again, don't start it)
-(This step might require your assistant) Within 6 seconds of turning the key to the ON position, press and hold the ODO knob and fasten the driver's seat belt
-As soon as the seat belt is fastened, the readout should change from the mileage to b-ON. Press the ODO knob one time and the readout should change to b-OFF
-Once the desired setting is reached (b-ON will chime, b-OFF will NOT chime), sit and wait for the LCD to show the mileage again.
-Once the mileage is displayed, you're done and can turn the car off
If you miss ANY step, this process will not work. I also read that while this works on all Gen 5's, it MIGHT work on the Gen 6's. This hasn't yet been confirmed.
-Get in and shut all the doors.
-Do not touch anything, even the brake, simply turn the key to the ON position (don't start the car)
-Change the ODO/Trip meter to ODO.
-Turn the key to off for a few seconds, then back ON again (again, don't start it)
-(This step might require your assistant) Within 6 seconds of turning the key to the ON position, press and hold the ODO knob and fasten the driver's seat belt
-As soon as the seat belt is fastened, the readout should change from the mileage to b-ON. Press the ODO knob one time and the readout should change to b-OFF
-Once the desired setting is reached (b-ON will chime, b-OFF will NOT chime), sit and wait for the LCD to show the mileage again.
-Once the mileage is displayed, you're done and can turn the car off
If you miss ANY step, this process will not work. I also read that while this works on all Gen 5's, it MIGHT work on the Gen 6's. This hasn't yet been confirmed.