Your front left strut is bad
Wouldn't that be a bad height sensor in the front left? The graphic shows the wheel hyper-extended, and not on the bump stops. That's what my Sport was showing when the height sensor was bad. The computer kept trying to lower that wheel (air out of the strut) thinking the ride height was too high.Thanks for the reply. I just changed the two front with New Arnott struts. The repair shop is not cooperating, but that's a different story. Thanks again!
Thank you gentleman,It drops overnight because is sees the left front corner as being high and it tries to lower it to match the others. It wakes up every few hours and relevels. If it can't relevel it will drop it to the stops eventually. Since you replaced the struts recently make sure the height sensor is attached to the front lower control arm AND make sure the arm on the sensor is pointing out towards the tire. It is possible to reinstall the connection wit the arm facing the wrong way. If its pointing in it will see an increase in height as lowering that wheel, and a decrease in height as raising that wheel. If you didn't disconnect the link for the arm the sensor may have been damaged if the hub and axle hung disconnected while the struts were removed and replaced, or the link itself broke where it attaches to the control arm.
So, after cleaning the sensor, the rig continues to drop overnight. I am thinking of calibrating the suspension before I replace the sensor or event the entire strut. I am thinking of buying the 4Dcan dignostic tool from RSW 4Dcan Diagnostic Tool. Storey Wilson has provided many videos that we all share on this site and seems to be a good tool to have. I don't think the shop I took the RR calibrated after replacing the front struts. The saga continues !Can't help with the shroud question my 06 doesn't have shrouds on either side and I don't appear to have any places to attach some other shroud to up under the main inner wheelwell covers. .