I have a G3 Var 1Z from December 1995.
The noise level was really bothering me, and the
flexible pipe had a lot of play, so I had it replaced last time with an inspection. Since the catalytic converter was welded to the old pipe, they also installed a new catalytic converter... EUR 900 for everything.
The buzzing sound is still there, but only the clacking noise when starting and stopping has disappeared.
Perhaps my engine mounts are still faulty, or maybe it's the bearings of the engine carrier itself.
http://people.freenet.de/golf-schrauber/motortraeger.jpg
Furthermore, I diligently used a lot of bitumen – but with only moderate success:
http://people.freenet.de/golf-schrauber/rueckbank.jpg
http://people.freenet.de/golf-schrauber/RR_leer.jpg
Constructively, the 1Z exhaust system is quite restrictive: Between the turbo and the MSD (under the rear bench), there are no mounting points, so almost 150 cm and certainly several kilograms of free-floating

.
Somewhere, that "Dorehnen" must have originated from.
Okay, please provide the German text you would like me to translate into English. I will only provide the translation.