I recently had this problem as well. The driver's door handle would not present, and you could hear the solenoid going "thwap, thwap, thwap" as it tried. Clearly a mechanical problem that persisted. Due to my schedule, I lived with this for a week before I could take it for a service appointment (they offered to look at it the same day). I found I could wedge a credit card under the handle and lift it when this was happening, so used this to get into the car. Service diagnosed this as "drivers door handle linkage failure" and replaced 3 parts under warranty.