This first happened to me about 2-3 weeks ago whileI was on the freeway, but it was able to come back up after I pumped it a couple times. But yesterday, as I was leaving work for lunch, ~3 minutes of after my car started, as I was pulling out of the parking lot, my clutch started not coming back up. I took it to the dealership a few weeks ago, but I couldn't replicate the problem. Good think the Nissan dealership is right next to my work, so left my car in first gear and crossed the median and pulled up to the service drive of the Nissan dealership. I was able to pull it out of gear to stop, but that was it. The clutch wouldn't come back up again, which is a good thing, since now I can show them the problem. There was no way of getting the car back into gear had I gotten it out of gear.
The tech at first said it was the master cylinder. Then my buddy called me back and said it was the slave cylinder that's leaking so they would have to replace it. And the new slave (I'm not sure if he meant as in the 370's slave or if he mean there's a newer slave cylinder for the 370) has to be removed and installed some yada-yada way, so they would need it til Monday cuz they have to remove the transmission. They authorized a rental for me until then. I recorded it just got the heck of it. Nothing to it. The clutch goes down and doesn't come back up....