My first post! My car bottoms out quite easilly when driving on A roads. Speed bumps require glacial speeds to negotiate. I've just changed the front springs, fitting OE items from an official dealership, which has helped, but I suspect that the Monroe dampers that are fitted may not be correct for my particular model. Any suggestions please? Or is this typical ? It's a 3.0L diesel, with 18" AMG alloys with 235 40s.