Hi Ive this week picked up a second hand hand 2008 c200 kompressor and after 2 days the passenger rear door will not open from either side the interior handle has gone loose which i assume is either the handle itself or the cable holder has broken away from the door card but also the lock rod is stuck in the up position and will not push down or pull up could anyone please pass on some tips on how i’m going to open the door to carry out the needed repairs please