as per title, I am considering downsizing slightly - I've been offered a pretty decent price for my GLS and a demonstrator E63S in a subtle spec at 30k off list. I wasn't really thinking of getting out of the GLS but there is an imminent new model, and I've had it 2 years (15k miles) and not really using the 3rd row of seats anymore so was thinking of a change. question is, will the ride of the E63S be very harsh compared to the GLS and is it possible to fit a towbar to a E63S wagon ?