The mount bolts on the passenger side are box, with very limited access. Yes, it's a big pain.

Most likely the rubber is gone at the control arms, too, or at least bad, and I've even lost the head of the long bolt there on the 280SE. Had to saw the other one off, the sleeve between the control arm and sway bar bush sets was frozen on something terrible, I just cut the bolt with a hacksaw.

You shouldn't have any other problems, on the W115 the bolt is long enough to fit right up, as I remember. On the 280 I had to use a floor jack to compress the rubber enough to get the nut on the thread! Tighten down only to where the is a nut's width of thread showing or a bit less -- equal to one or two threads showing out of two nuts (the new ones are all locker nuts, not the origianl twin nuts). You can screw it down a whole lot more, usually, but you will compress all the spring out of the rubber and it will ride hard. Ditto on top shock mounts as well, the are often greatly overcompressed.

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!