Touareg R5 - How to solve shuddering/vibration and power leak

Touareg TDI R5 2004 manual gearbox.

As explained in this video, this shuddering happened first time to time or for a moment only, but after a year it became daily.

It's not easy to discriminate this fail among next pure mechanical ones:

- Turbo - Turbo akktor
- MAF sensor
- Injector kaput
- Drive line/automatic gearbox issues
- ...

BEFORE ALL: first check air/diesel filters, check all electric contacts possible and do a deep SCAN to check fail codes.

In my case, no engine/electronic fault light appeared in the cockpit.