400cpe

The car runs smooth as glass. You park the car and have dinner,upon leaving the car doesn't want to start occasionally. It tries to start but it sounds like it has a bad air/fuel mixture problem. At times it will take several tries before it starts,very intermittant. We left it with the mechanic for a day and of course it would not do it,

Just wondered if anyone else has had this problem. I checked back on the SC threads and Intellexual,and didn't see anything. Any help will be appreciated,we don't want to drive the car this way. It's frustrating that it isn't getting fixed.