I came across the list as shown but I am sure that this is not the definitive list:
Mercedes offered the Sportline package as an option to improve the handling by firming the ride.
Mercedes started offering the package as a retrofit option on all W124s for all owners that missed out the first time around.
This is a list of the parts:
Mercedes Benz Sportline-specific suspension parts: 1986-1992
Front spring, 2 each 124 321 29 04
Front strut, 2 each 124 320 64 30
Front sway bar, 1 ea. 124 323 68 65
Inner bushing, 2 each 124 323 45 85
Outer bushing, 2 each 124 323 51 85
Lower control arm bushing kit, 2 each 201 330 01 75
Lower control arm bushing kit, 2 each 124 330 09 75
Lower control arm bushing kit, 2 each 124 330 06 75
Rear spring, 2 each 124 324 28 04
Rear shock absorber, 2 each 124 320 23 31
Rear sway bar, 1 each 124 326 19 65
Bushing, 2 each 124 326 01 81
Rear sub-frame mounts, 2 each 129 351 14 42
***1992-1995 have different front springs, P/N 124 321 30 04