I would definitely NOT reinstall the Self Levelling Suspension. Leave the T as it is right now.

When I had my W123 300TD it gave me so much trouble, I finally asked the dealer to adjust the weight sensor on the rear axle as so the system will level the car ONLY if it was fully loaded.

The W124s T's I have owned did not gave as much trouble as the 123 did, but still, I did not like the system very much, especially in terms of maintenance.

My S 500 L, not being U.S. spec, thankfully has regular shocks all around.

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A. Rosich
CL 500, 1998
S 500 L, 1998
E 320 T, 1995 [Sadly sold ]