Not necessarily... when I first lowered the merc, I towed a log splitter to palmy and over 80 the front/steering wheel shook so bad I actually stopped to check teh wheel nuts... it was so bad my horn-ring was rattling on the steering wheel!
got to palmy, unhooked log splitter and drove down the road all the way to 140 without even the slightest wobble... and I used to do tyres/wheel alignments in oz in the mid 90's so I sorta thought I'd fucked something, but the whole time it was the log splitter I was towing...