I have had a similiar problem. Local MB dealer did an alignment after a minor accident.

I then bought new tires and started getting excessive wear on the inside of all four tires. After showing the MB dealer both the old tires that had started wearing, after the alignment, and the new ones they did a second alignment, but denied being the cause.

The new set of tires continued to wear and had to be replaced.

I am now on the second set of new tires and paid the dealer to do another alignment. Now I am getting wear on the outside edge, not the inside edge of all four tires. Although the wear does not seem to be as excessive as it was when on the inside edges.

The dealer continues to claim it is my driving habits, or bad tires or anthing except their fault.

My tire dealer claims it is a bad alignment.