you should have it checked just in case.
My fiancee mentioned that she heard some noises in the front of her 156 and I had a look. She was right, the front stabilizer bars were shot.
By the way, I called the dealership for new ones. The told me 163 euro with VAT for the pair. I told them I didnt want them and I ordered the exact same ones brand new and original from ebay for 23 euro including shipping

and yes, thats the price paid for BOTH of them !!!
Does your problem occur if you steer fully left or right ? or just with slight steering ?