Originally Posted by Macky112
...1. is there an easy way to test this?
2. if the sensor is working, what should I expect from the trunk loading test?
3. how quickly does the sensor and headlight respond?
4. if I just rock the back of the M3 up and down, do sensor and headlight react fast enough to respond?
2. headlights will remain pointed where they should be.
If you can rock your M3 end-to-end, you must be a giant, because the suspension is 'way too stiff otherwise.