Possibly. The higher the rear, the more hydraulic fluid is in the system, i.e. in the rear hydraulic shocks. It is the hydraulic fluid that makes the height. Alternatively or in addition, if the diaphragm of the accumulators is leaky hydraulic fluid will enter the space that is normally occupied by nitrogen.
Of course this is assuming you do not have a leak.
Good luck, Bruno

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1992 300TE 160 kmiles