Mine started acting up today (about fifteen minutes before finishing my job...go figure.) Engine shut off for no apparent reason. Turned the key and it started back up. Each time it stayed running for a shorter time. Then turning the key I got a click then no click. Faint electrical smell. Called the dealer and the service tech immediately brought up the switch and also said to check the wiring at the connection to the switch. He said that a few have caught fire at that location.
I made it to the dealership before closing to get a new switch, so we'll see how it goes in the morning.