ML350 4matic road noice from 110 km/h on tar road like a whoooooo sound

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Continental ecosport5 Tyres are tested and replaced. No joy. No difference on tempreture or use of nitrogen. On perfect flat tar the noice is gone. The slightest uneveness is picked up. It is like a resonance that travels through the vehicle. I drove two other new ML's. One did the same and one not. The one that didthe same did not have 4matic and had Mitchelins on.