Back in the 80's there was a recall for W107 roadsters and coupes with
the V8 engine. The fault was that the lower control arm mounts had an
habit of ripping off the subframe. If the car was brought into a MB
dealership then they replaced the complete subframe with a modified
The reality is that very few cars were actually presented to have this
done and there are still many cars on the roads today that are an
accident waiting to happen. We have on average 2-3 cars a year towed in
with control arm mounts that look like those in the pictures on this
page. Multiply this by the number of workshops around Australia and the
high survival rate of W107s in Australia and this is a real issue.
We have also seen one example of a W114 280E do the same thing. The W115
and W114 chassis shared almost the same subframe.
If you own a W107 and the subframe has not been replaced there is a
Mercedes-Benz approved solution that involves welding in some special
plates to reinforce the control arm mounts. This can be done with the
subframe still in the car and without having to disassemble the
If you have a W107 where it is too late and the mounts have torn away the
solution is to either source one of the replacement subframe from a wreck
which is extremely rare, or to get a subframe that has not been damaged
and have the reinforcing plates welded in. The shots below show this
process being done in our workshop.
The procedure to replace a subframe with torn mounts is quite complex as
the subframe also supports the engine. It has to be removed and all the
suspension components swapped over.
For any further information on this subject please phone 02 6239
3236 or e-mail us.