The later years were probably heavier, but I suspect your example simply had worn out suspension.

The ride height can be adjusted with different spring pads. New springs generally are needed to restore original ride height (higher). Replacing all the suspension bushings in the rear suspension should also result in an increased height.

__________________
Respectfully,
/s/
M. Dillon
'87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted
'95 124.131 (E300) "Sapphire", 380k miles
'73 Balboa 20 "Sanctification"
Charleston SC