The unit provides Reverse gear, Illumination, and Speed signal. 2001 - 2006 Compact (E46). EIA color-codedwiring for easy installation. This product can expose you to, known to the State of California, to cause cancer.
The unit was not a plug and play. The harness had to be wired into the factory harness and it does work with the existing steering wheel buttons but only about 60% of the time. After double checking the switch settings and homing out the harness it seems the intermittent operation is from the module. It's getting the inputs from the steering wheel buttons but not outputting consistently to command the radio. It's OK but leaves much room for improvement. Not jazzed with the quality.