But the rear subframe mounts do go on w124's . mine failed it's MOT last year on this , and i had to have it done ( £600 ) ...
Apparently the underseal stuff can develop a crack , and lets water in which runs along the rails and just never gets out , corroding the subframe mounts ....
I do remember reading about your saga at the time - in fact, every time I look at my subframe I feel a slight worry that I might suffer the same problem. I helped IBW replace a W124 rear subframe last year so I know what a pig of a job it is, too.
Looking back on that episode, are you glad you kept the Whale?
And I'd only whipped my wheels off to have a look at the brake discs and pads... they're fine...
I've been thinking about this a bit more, and reckon I'm worrying about nothing...
When I first looked at it, I thought that there should be no gap - that the subframe should be hard up against the body structure. But that would defeat the point of the bushes - which is to allow the subframe to move relative to the body. Also, the size of that gap is determined by the length of the bolt - not by the condition of the bushes. So assuming the bolt is tight, the gap is right. I think.
Olly - agreed that if the subframe moves too much then the bushes need replacing. I'll take your word that they're "not to much hassle to change"... I assume you mean that, with the right tools, you can press out the old bushes without having to remove the whole subframe?