X2 on this. Did you try it yet? It could be a tire balancing issue.

I would say any time I hear someone has replaced their entire front suspension, it means they generally don't know what they are doing.

I have put hundreds of thousands of miles on old W123s and my experience has been that generally only one or two components need to be changed at once and that often there are problems with the (new) aftermarket parts not meeting the quality specs of the OEM German parts. If you replace everything and then have problems, you will need to be a front end genius to figure them out because you have no history of driving the car after meticulously changing one part at a time and observing the ride quality.

Just my $0.02.

Dkr.