Comparison trip C70 – urgent problem !!!

Hello Elchgemeinde, I have the problem that because of a warranty dispute with my C70 which I bought last year from a dealer I need a “comparative vehicle” for the expert ( with similar high KM running performance Bj 2001 about 75tkm ) … Background : My C70 drives in and for itself great, but has extreme vibrations/vibrations in the steering wheel, the whole steering column swings unbearable. The SV has also confirmed this, it goes far beyond the “normal” torsion problems that are due to construction. However, it needs for the opinion an objective comparison. And our beautiful Cabrios unfortunately do not exist sooo often like a Golf Cabrio that every dealer has standing around somewhere… Therefore my polite question : Would someone be basically ready with me to make a comparison journey and the expert? Financial expenses will of course be settled by me. Irgendwer here in the FOrum from the area Munich/Erding/Freesing/Landshut ? Many thanks in advance already to all ! Bildeve