I also own a W124 wagon. Possibly it's due to the roof rack. These wagons are design to haul stuff up top. As for the larder sway bar, maybe it's due to wagons weighing more than sedans.
1994 MB E320 Coupe (199,500 mi)
1992 MB 190E 2.6 (173,000 mi)
1983 Porsche 911SC (148,000 mi)
2004 Volvo V70 2.5T (198,000 mi)
President of CT/Westchester Section