Vibrating W126s ...
We have 2 126s - the 300SE and 280SE.
Funny thing is that we have new wheels & tyres. Got them on-wheel (not to mention off wheel) balanced. YET we feel the vibration at sporadic speeds. Not necessarily at precisely 120 (km/h) or 140. It could be 110 or 140 sometimes.
I know the 300SE irons out the vibration at about 160, but feels a little shaky at 140 at times.
Other than going in for more balancing acts, drive shafts mentioned as possibility.
Could there be some other things we ought to look at?
126 tailed by a 203, 129 leading the pack.