I got a response from the maker of the mounts. It turns out that the mounts most likely came from a batch of faulty ones made around 6 years ago from urethane with incorrect chemistry. They held up remarkably well on my 240 given this issue. The manufacturer offered a replacement pair FOC.
__________________
 Present: 1990 240GL saloon, 1992 240 estate
Past: 1988 240GL; 1971 144DL; 1972 145DL
|