hi, need some help, we tow alot with our tdi but we have noticed some rear end sagging, so to speak, we have been advised that we may need a set of spring assistors in order to continue safe towing. The problems we have experienced whilst towing the caravan is that the front end seems to be lifting, kind of almost loss of traction/wheel spinning when you pull away. We know its nothing to do with the loading as we have emptied the van and the towing limit is well in, we actually know someone else with the same problem. We have been recommended MAD Suspension, has anyone heard of them/recommend them, or any other compatible or similar item, if so where do i get them and how much does everyone think they will cost. I would be extremely grateful for any help and advice that you can give and shall look forward to your comments cheers barry