cfoster

I have just installed an Airrex setup on my W212 Mercedes (the kit was not brand new), all seemed to fit ok and works fine (Airlift V2 management), however at the back I am getting a horrendous knocking noise, almost sounds like top mounts. With the car stationary moving the car up and down by hand (jumping in the trunk!) makes zero noise, only when moving. I have replaced the top mounts anyway with new items which made no difference, everything seems tight.... Any ideas?!

Does anyone else have the airrex kit and if so do they have the installation manual? I can only think it being the bags now possible moving around (although they feel tight by hand).

Help!