The summer wheels (by the way always changed between the rear and the front when changing tyres) suddenly had a sawtooth with loud rolling noise (Michelin Primacy HP with MO recommendation from Mercedes and without reference to sawtooth inclination in Motor Talk) compared to the previously driven, quiet winter wheels. The summer tyre profile had 0.25 mm less on 3 of 4 wheels than before storage (e.g. just under 6 instead of 6 mm). have no saw tooth (so separate track adjustment, defective shock absorbers or driving style, etc. as a cause). Explanation for the “sudden” saw tooth? 1. a) Since the noise increased only slowly in the last summer season, it did not notice and the saw tooth was therefore not discovered. b) The 0.25mm are measurement tolerance. 2. a) The summer wheels could theoretically have been rented by the tyre dealer for about 2000 km on an unsuitable car with wrong track or defective shock absorbers. b) According to my observations, 2000 km can explain 0,25mm profile reduction based on the mileage since outsourcing.So the theoretical question: Are 2000 km on the wrong car with lane adjustment or defective shock absorbers to create a feel-, sight- and audible saw tooth (not yet vibrating in the steering)? Since the car is ok and the tyre type according to available information is actually also, I would like to get the cause out before I buy a new tire. Answer 1.) then probably a different type of tyre from Michelin (are “most roundest”, even if he does not have a MO recommendation from Mercedes (due to there testing). Thank you for relevant tips in advance greeting CGI BE