Rejection 80: Test Drive an Expensive Car

Of all the commercial places, I don't know where car dealerships would be ranked in term of the least desirable places to visit. My guess is that it is pretty low, comparable to pharmacies and tax offices. One of the reasons is the constant pushing and prodding from car salesmen. Today, I wanted to see if I could go into a BMW dealership requesting a test-drive, while making it very clear I wouldn't buy a car from them that day. Although for his time, I would promise I will visit him again when I do decide to buy a car. Will this promise be enough for the salesman to grant my wish?