What the category guarantees, and what it does not
The fare first, because that is the question people actually ask. A sedan journey does not go below 50 EUR. Hourly hire is 70 EUR an hour with a four-hour minimum, and a radius of travel around the starting point is included.
What that buys is a category: three passenger seats, two large cases, an upper-range car and a driver who works in French and English. What it does not buy is a named model. Only one vehicle is owned outright here, the van; sedans come from a network of selected partner chauffeurs, and promising an S-Class then delivering something else is the fastest way to lose a client for good.
The same run at 8 am and at 7 pm
Between Nice and the principality three roads coexist, and the tourist office names them itself: the Basse Corniche on the D6098, serving the seafront, the Moyenne Corniche on the D6007, serving the hill village, and the Grande Corniche on the D2564, running over the pass. The D45 and D46 link them, so you can switch from one to another mid-route.
A driver who knows one route is stuck with it. The choice depends on the hour and the direction, and it gets revised on the move when a corniche closes overnight for works and the diversion pushes traffic onto the one above. That arbitration is invisible from the back seat, which is the point.
Two cases, and what stays behind
The limit on a sedan is almost never the number of seats. It is the boot. Two large cases go in, a third does not, and putting it on the back seat is not a serious answer when three people are travelling.
Outsize luggage is declared beforehand, not on the pavement: skis, golf bags, instruments, professional equipment. In those cases the automatic calculation stops and the request switches to a quotation by message or by phone. A fare that cannot be held is not displayed.