general problems of the 2010 Jaguar XF

Was driving down interstate and light came on saying coolant low, air conditioner was still blowing cold, but I turned off air, maybe 3 minutes later, loss acceleration power, black smoke billowing out of pipes and under hood and light came on saying low performance turn engine off. Immediately pulled car on side of highway. No warning car was running hot. Car was disabled would not start later and computer reading still registered cool. Gas was smelling all though the car and proceeded to leak from under car after towed away. At the dealership, the car had gas leaking under it on the ground when I went to retrieve items out of car. Dealership said it would cost 36,000. Plus to fix. Car is still sitting at dealership with no solution. I felt we were fortunate to get out of car alive because I felt it could have exploded. Dealership says it was water pump, but engine was never torn down to determine that.