Survey Sandero steering wheel flaps

Hello! For about 2 weeks we have a base Sandero with now approx. 700km on the “clock”. My wife came back from the first proper highway ride and reported about steering wheel flaps from 140 km/h. I just turned a lap and found the same. Hopefully only the wheels are badly balanced. On Monday we will complain directly to the dealer. In addition, the windscreen wipers are fierce, but that should be the smallest problem. nd Conti Ecocontact 3 on it. I used to lower the pressure at the front to 2 bar, without success. Now my question: Who has or had the same problem? Could it be fixed? Which tyres have you mounted, is there possibly a connection? Otherwise I have to say: Great car with quite a lot of space for “small” money. Greeting, TDCI96