Mondeo Rear Suspension Aid

JSGARTH

I tow a 2014 Lunar Clubman ES with a 2010 Ford  Mondeo. I believe that the car and caravan are a good match and very pleased with the way that the outfit tows. My one disappointment is that when laden the rear of the car is noticeable down, with the result
that speed humps, particularly French ones, are a real problem. I am considering fitting some form of rear suspension support. I have read the Club's leaflet explaining the different types available but wonder if any Forumites have experience that they can
share or advice that they can offer.