2005 VOLVO S40N Electrical Systemstarter Assembly Problems

I OWN THE 2005 S40. THIS IS THE SECOND TIME IN 2.5 MONTHS THAT MY CAR HAS JUST DECIDED NOT TO START. THE FIRST TIME, IT HAD JUST BEEN SERVICED AND I DROVE ABOUT 20 MINUTES TO A GAS STATION, SHUT OFF THE ENGINE AND THEN IT WOULD NOT START. AFTER A FEW TRIES IT DECIDED TO START. I TOOK IT IMMEDIATELY BACK TO DEALER AND THEY KEPT IT FOR A DAY AND SAID NOTHING WRONG. IN THE MEAN TIMES, A FEW DAYS BEFORE THE NST TIME THE CAR FAILED TO START, I THOUGHT I SMELLED SOMETHING FIRE-LIKE SMOKY, BUT FIGURED MUST BE MY IMAGINATION. SO THE SECOND TIME, I PARKED THE CAR AFTER DRIVING ABOUT 45 MINUTES AND THE CAR WOULD NOT RESTART. I DID NOT CONTINUE TO TRY TO START IT, BECAUSE I WANT THE DEALER TO SEE WHAT IT DOES AND HAD IT TOWED THERE. THEY SAID...