Check your spare tire. The tire below was installed by my dealer when I bought my brand new 2005 ML 500, at the Mercedes of Sugarland dealer here in Houston, Texas. This was a brand new 17 miles vehicle..
The Mercedes dealer replaced my brand new tire with a totally useless tire shown below.
I did not find about this defective tire until a couple of months later, when I got a flat tire on my way to Big Bend national park. I got stranded and the Mercedes Road side assistance told me that spare tire could blow anytime.
I found a truck tire place where they put a huge patch on my original flat tire, which could not be repaired due to the size and position of the hole, and then I crawled hundreds of desserted miles to the next town where I replaced my flat tire..
The crooked Mercedes dealer above, who is already well known for it's crooked schemes, most likely installed those brand new spare tires on the used cars that they sell at overpriced values... I still remember the sales manager's name "Jeff Snyder". That SOB installed the defective wheels and tires of his ex-wife into my brand new 2005 ML 500, and charge $5000.00 for it. Never got my money back and MBUSA told me that the dealers can sell anything they want to, and that they are not responsible for it... I should have gone to court and sued MBUSA and the Mercedes of Sugarland dealer...