Kestas, I had a similar problem with our 1995 E320. Turned out to be a bad coil pack. Bought a new coil pack and swapped it into the 3 different coil locations ... the rear coil pack was the bad one. If you find that the engine mounts are collapsed recommend buying replacements from a MB dealer because some aftermarket mounts are inferior quality and fail quickly.

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Fred Hoelzle