I have a 2006 M7 162track that I am having problems with the rear suspension of it is bottoming out and sounds like the track is hitting the tunnel. I took it to the dealer and they told me that I had blown shocks and I also put on the heavy duty springs. I am a big man at 6'3" and 300 lbs. The problem also sometimes is that I can stop and push down on the rear suspension and it will go all of the way to the bottom with one finger and stay there. And I can get back on and go for a short little ride and it will go back to normal. I am not sure what is actually taking place and am not sure I want to take it to the dealer and let them tell me, they told me last time this heavy duty springs and rebuilding the shocks would fix it and now two rides latter I have the same problem. I would greatly appriciate any feedback or do I need to look at aftermarket for my size. Again any help would be great. Thank you.