Hello again, I’ve noticed for a little while that my car gives between 50 – 60 km/h a somewhat louder sum/heulton of itself. Happens even if I push slightly on the accelerator pedal to swim in the current. Goes below 50 km/h and over 60 km/h. Goes away even if I go more on the gas. I only changed the gear oil before 100 km. It cracks, screams, rumbles etc. nothing else on the vehicle…. drives quietly and cleanly…… only in the top nnd area. Even with the noise, the car switches and drives clean and quiet. Since yesterday, new winter tyres are also on it…. same noise as with all-weather tyres. Can this perhaps be due to the light engine or to the belt? I am grateful for every advice. Greetz