I was sold an ML-320 and discovered that the car was not serviced as they stated. They also sold me a car with no spare tire or tools to replace a flat.
Do not trust what they say to you ! They lied to me and sold me an incomplete vehicle. The car salesman assured me the car was in excellent condition and it just came back from the service department getting its latest scheduled maintenance. I discovered that did not happen.
While they rest the maintenance counter in the car, they did not perform the service. I took the car down to a Mercedes dealership in my hometown. When they went through the car they discovered the fluids and filters were quite old and dirty.
This is not a good group which to do business.