Does anyone know if tire rotation is recommende by mercedes?
Owner manual says only" if all 4 tires are snow tires"
or to follow tire manufactures recommendation.
The dealer just rotated my tire after a wheel balance and now the car pulls or drifts to one side(it was perfect before)
Any thoughts?

 

Drifting is an alignment problem. As for rotating, your car probably has directional tires so they have to stay on the same side of the car. If you don't have a staggered wheel setup then you can rotate them front to back.

 

I was told by MB that they need to be rotated, but like Josh said the back has to stay on the back, and the front on the front. Since you probably have directional tires, that would require remounting them since the front and rear are different sizes.
Hope this helps.