I did the Factory collection, I couldn't recommend it enough [
].
Really well looked after by the tour organiser, the Taxi people where spot on with timings and drop you right outside where you need to be- so no stress about if you haven't been to the factory before.
We were offered various flight times and took the early one in order to spend the day in Stuttgart.
If you have time the new Mercedes Museum is well worth the visit.
You'll have time to do the excisting Porsche museum prior to the factory tour should you wish to take it... then collect your car after lunch.
Heathrow is the normal Airport to fly out from but you can pay a small addition to fly from the airport of your choice.
We chose Birmingham for an additional £15 per person[8D]
Depends on what time of the year your going as to where you may want to venture, Swiss Alps are only 90 minutes away[
].
Just North of Stuttgart is the Sinsheim museum, you can then get a nice backdrop of Concorde in the pictures [
]
www.technik-museum.de/uk/
You will need to take paperwork from the OPC with you, my OPC failed to do so which caused a little stress on the day!! but nothing a calm receptionist and a fax machine can't put right.
Chris, if you have any question feel free to ask.
garyw