Hi. A couple of days I attempted to bring my SLK out of its slumbers to find that the battery was very low, the starter engaged but would not turn the engine, so I put the battery on charge for a a good few hours and now it is fully charged. This morning I attempted to start the car; all the lights within the instrument panel come on, fans run, radio/nav works, side, brake and headlights are fine and I'm getting / seeing 12.2 volts standing voltage when I press the re-set button on the binnacle three times. However, the starter will not engage in as much there is no mechanical noise when I move the key to the start position and none of the consumers such as heating fan, radio, and instrument warning lights etc either go dim or extinguish. Any ideas?