I am the owner of a CDT too. I found my CDT to be sluggish and with a caravan in tow, even on the flat, if there was a head wind had to go from 5th down to 4th. I first fitted a synergy box then removed it and had a 160 remap. I assume my CDTi is standard but it is so much better with and without the caravan then my CDT was.
And a dog is a mans best friend.
Do you find your CDT sluggish?
macafee2