my smartie wont starty please help

[smartie]

hi all,
i bought my smart car about 4 weeks ago and all was gr8 until the other night i went to start it and it just didn't start i drove it that day and something strange happened i stopped at a junction and the put my foot on accelerator as usual but didn't move any ware for a couple of seconds and then suddenly kicked in (did not put foot all the way down, was driving normal) and a couple of times before that when i have tried to start her up it took a while longer than should have...?

OK so at first u could hear the water pump whirring but now nothing, all that happens is on the dash the digital circles for fuel gauge and temperature flash and i have a horizontal line in the square that usually appears with the n /drive mode, i have mechanics in my family but have never worked on smarts..... they have changed all fuses and there is power in the battery the windows work and the doors lock and CD player works but the soft top wont work and the car wont start my car is a smart passion cabriolet 2002 ,petrol right hand drive with 47miles and full service history does any 1 have advice please................?????