hi all.
i have an 05 lr3 hse. i too also had "a tilt" of about 1" difference. when i first brought it up to my service advisor in '05 they recalibrated the system and it helped. but it than came back. it was really noticeable if the vehicle sat in the garage for a couple of days with no driving. when i took it back again and told them to let it sit in shop over the weekend is when they agreed something else was wrong with it. they than tried replacing the air shocks compressor (i think the 05's had a problem with them?) that too seemed to help, but than the tilt came back. they than replaced the front rt. airshock. this helped some, but there was still a tilt. at my last general service, (last week) i brought it up again that it was still tilting some and they said they would look at it again. when i went and picked it up, they said they found a sensor problem with the right front shock. they replaced it, and so far, all is good and level. maybe some of this info will help.