I bought 2022 glc300 4matic February. I had vibration on the steering wheel that would last up to 30 seconds after going over bumps and pot holes. Took it to the dealer. They said it was issue that can be fixed with software update. They sent data from car to MB engineer. Software was updated and vibration better but still there. Just last a second. Took it back to dealer. They needed a special tool to make adjustments. Mechanic still felt vibration during test drive. Software was updated again. Steering wheel vibration completely gone.