Battery struggling to turn engine over, could be battery is on the way out, they do not last forever. a lot of places will do a free battery check, checks the amperage out, to see if upto capacity. Cables will get warm, they always do, with the high current passing through, but usually you do not notice, if engine starts, Could also check your glow plugs make sure they are ok, all helps with cold start
SD
February 2012