Just got the new marco polo last week but still cant get one of the rear seats flat. On p29 of the owners manual its states that this means there is an electronic fault and you have to press a reset button located under the cover in the extension of the interior head restraint bar. I really cant find this. Has anyone else found it or knows where it is . I can not feel a button, and you can't actually remove the cover fully at the base of the rear seats to look as they are not fully removable. Will be sleeping on an incline otherwise! There is an online interactive mercedes manual which is more up to date and shows that the button is under the through loading facility which is the smaller compartment under the rear seat which you lift up for storing long items, but I can't see the reset button there either!