It was a brilliant experience, I don't know how much you know about it but the basic package at no cost (other than the usual delivery charge) is MB transport you business class to the appropriate city, collect you from the airport and put you up at a 4 star hotel with dinner and breakfast included and then a taxi to the works next day. The factory tour was excellent; we were taken around the S class line and took about 11/2 hours I could happily have spent all day on it. After a free lunch we collected the car, full of diesel, paperwork insurance and number plates all sorted and went across to the other side of Stuttgart to the MB Museum, which is another terrific visit. The basic package is for the tunnel crossing but we paid a little extra and used the Rotterdam Hull crossing. If you want your partner or friends to go with you it doesn't cost the earth and in addition to my wife her brother and wife also went and thoroughly enjoyed it.
If you want to know anything else let me know
Dave
PS the E class estate is a superb towcar.