I have 9 bundts, with a set of summer tires and a set of winter tires along with a spare.
When I need tires, I will take loose tires+rims to discount tire and have them mounted. then I change them at home.

but you could have a misbalanced tire or an out of round one, even brand new. have them load test the tires if they balance OK.

and maybe we could help their diesel tech become a better, more informed MB enthusiast instead of poking fun at him. we all started somewhere... Although he may want to start somewhere else, by looking at his car....

__________________
1984 123.193 372,xxx miles, room for Seven.

1999 Dodge Durango Cummins 4BTAA 47RE 5k lb 4x4 getting 25+mpgs, room for Seven.