I regularly pull a a large heavy trailer and I have noticed the rear is constantly 3cm lower than without load. Normally the center of the tow ball is 40cm above ground but with the trailer on it is constantly at 37 which is a bit low and on uneven ground it can be to close to the ground.

I have no error messages with the trailer hooked up and I can still raise the suspension but when going back to normal level it is again 3cm low.

Anyone experienced anything similar.

Has it been coded to stop it dropping?
Or do you mean on the move it’s low?

With the trailer hooked up the rear is constantly 3cm low both on the move and standing still. My Disco 4 always levelled off at the same height regardless of load or trailer.

Can the suspension be coded to have a different height when loaded vs unloaded?

Well it should level so get the codes looked at, hight sensor probably.

How would an issue with the height sensors only materialise when the trailer is hooked on?

What does your 4x4 info screen show? Is there a difference between loaded and unloaded? That shows the height sensors…..

If the height sensors show the same height, maybe it’s the tyres squashing due to extra load, but that does seem a lot to just be tyres…. Only a thought….

 2011 Range Rover Vogue SE 4.4 TDV8

Previous cars :
2003 Range Rover Vogue TD6
1999 Discovery Td5 ES
1995 BMW M5 3.8 6 speed
1992 Range Rover 3.9 Efi Vogue
1992 BMW M5 3.8
1988 BMW 735i SE
1989 Ford Sierra XR4x4 2.9i
1981 Ford Fiesta Supersport

I recalibrated the suspension with my GAP today and it turns out it was more than 10mm to high in the front more than 10 mm low on the right rear wheel. Will be interesting to see what happens next time I hook up the trailer.

I regularly tow a cattle trailer with stock so 3 ton + behind the L322 and the suspension height never changes much, once hooked on the suspension levels itself and off we go. I did calibrate the suspension after I bought an IID3 tool and that showed differing heights on every corner, (not that I ever noticed) reset the heights and since then it has all been fine.