Hi, Ive not used my 2001 CLK for 6 months or so, it's been on trickle charge to keep battery topped up. Went to start it and battery was flat, so put in boost charge. Now when I get in and put fob in ignition it makes usual sounds, panel warning lights come on, but on turning fob to start there's just a click. Anyone have any ideas? Any advice welcome, it@s booked in for MOT tomorrow at 8.30!!