Great VW advise.
My Uncle was a great Ford man and got one of the first mini Mustang Capri's when they were released and raked the whotsits off it from day one and that thing went like a rocket. He has continued this procedure for the last 50 years on various BMW, Merc and SAAB products with the same results so I think his theory is good just bury the throttle pedal and keep it there.
