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  1. M

    Mysterious disappearing vibrations at 140 km/h - common C6 problem

    Hi C6 users, You are all my last hope For over 2 years I'm struggling with mysterious vibrations at high speeds from 130-140 km/h (now noticeable even at lower speeds). Occasional body vibration occurs - I feel it mostly on the seats and whole car body. Occasional means it disappears in a...
  2. M

    Subframe mounts

    Hope this is the right topic to share my mysterious vibrations. Patient is 2,4 BDW C6 Q Driving 130-140 km/h occasional body vibration occurs - I feel it mostly on the seats. Occasional means it disappear in a moment to come back in another. So far exchanged: - gearbox (manual, fitted with new...