I have a 1983 300D. I recently replaced my engine mounts, and the engine shock mounts, as well as the transmission mount.... I have noticed that there are 2 different transmission mounts.

Mount #1 is a mount with an oval tube in it.
Mount #2 is one without an oval tube in the middle.


Mount #1 is thinner than mount #2. Other than that, they seem to be the same size...


Is there a difference in the mounts in their performance or longevity? Are they interchangable in my car? I have replaced mount #2 with mount #1 and it seems to work fine, but Im kind of worried about it lasting due to it being a thinner mount.


Any opinions?

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1983 Mercedes 300D
Atlanta, GA