When the driveshaft was out, did you check the U-joint for notchiness or stiffness? The U-joint vibration will be much greater than a thump or wobble from a tire. An axle shaft will feel about the same as a tire that has a problem.

__________________
Current stable:
1995 E320 149K (Nancy)
1983 500SL 120K (SLoL)

Black Sheep:
1985 524TD 167K (TotalDumpster™)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)