i'm now told by dealer that allowed tolerance in height of air suspension is 30% (!?!) which explains why some cars are lop-sided even on a flat surface

could this possibly be true?

Sounds like a load of Dealership waffle to me. Arctic Frost TDV6 SE. Aspen Leather, Cherry Wood, Privacy Glass, PTI, Tow Pack, Mudflaps, Tasmods, a new Fuelflap, a RRSport.co.uk umbrella in the boot & a RRSport.co.uk sticker on the rear glass.
__________________

Some people accuse me of thinking the world revolves around me, but I'm not stupid . . . I know it revolves around the sun. Which shines out of my @rse!!!

rrsboy sounds like waffle to me to but TB should know.

Would think if standing lopsided on flat surface the height sensors need re-calibrating or one or more have packed up.

30 percent is one heck of a big tolerance and certainly would not wish to drive a vechicle with each corner having that wide a difference. Dealer made up fact

Found this over on Disco 3

http://www.disco3.co.uk/forum/topic16221.html?highlight=lopsided

Would seem that the dealer does not get paid if a fault code is not registered if under warranty.

A large tolerance is allowed before the fault code is registered,

hope that helps

Never heard of this!!  Malaysia Boleh!
4.2SC Chawton White, Stormers
Tasmod's Sills, Wind Deflectors, LR Sills
Clear Side Repeaters, Towbar
Larini Sports Exhaust, K&N Air Filter
______________________________
WINNER - 2008 'Tech-Head Of The Year' Award
WINNER - 2009 Outstanding Contribution
WINNER - 2009 'Tech-Head Of The Year' Award

that's dealer BS and TB has the knowledge !  
L 405 2013 FFRR 5.0 SC
--------------------------------------------------------------
WINNER - 2009 �Best Avatar� Award
WINNER - 2009 Comedian Of The Year Award

*yawn*

attempt #8 did not work ("re-calibrating the new height sensors blah blah blah")

next stop.. kidnapping the courtesy car

dealer is STRATSTONES NEWPORT (SOUTH WALES)

Try another dealer or call LR customer service?

yep call LR customer service !  
L 405 2013 FFRR 5.0 SC
--------------------------------------------------------------
WINNER - 2009 �Best Avatar� Award
WINNER - 2009 Comedian Of The Year Award

+/- 10mm at each corner when driving. If stationary for more than 2mins then tightens tolerance to +/-3mm. It can therefore theoretically have a side to side difference of 20mm so can look lop sided but working ok - this is to stop the system levelling all the time which is bad for component durability.
When calibrating with the correct dealer diagnostic equipment the mean height will be set as a measured trim height offset from the height sensor readings, its the control strategy that dictates the allowable tolerances (if the dealer has calibrated correctly).

To check calibration -
If you can park on a completely flat surface, like a concrete base etc, then leave the engine running for say at least 5 mins with all doors shut then measure the trim height difference left to right at the front and left to right at the rear, if ithe measurements are within or around 3mm difference then then its fine, even if its about 5mm i personally wouldnt worry about it as height calibration is difficult to get spot on and so you may get it back worse than it was! (dont measure the difference front to rear as these nominal trim heights are supposed to be different) Trust me, i'm an Engineer!

Those small tolerances are quite reasonable but we have seen cars that are very visibly leaning over to one side when parked on the flat. These have subsequently been determined as faulty ride height sensors - most dealers don't tend to baulk at replacing them under warranty (if warranty still valid of course).

 

2009 Outstanding Contribution Award - Joint Runner Up
2009 'Tech-Head Of The Year' Award - Runner Up

Like it here? Then Donate to RRSPORT!!

Good call, the calibration can be spot on but if the sensor signal has drifted it will be all over the place!

 Trust me, i'm an Engineer!