Originally Posted by skywardhunter

In Dubai due to the sheer volume of arrivals using chauffeur drive it's on demand. After customs turn right there's a dedicated chauffeur drive area, they'll assign you a car (basically no wait) and you walk out (20m to exit) and there are all the cars. No need to pre-book or enter a destination in advance.

Once you wish to return to the airport you inform the hotel front desk or if there is a dedicated Emirates CD desk or person inform them and they'll have a car for you within minutes to take you back. It is all very seamless and done dozens of times a day for other pax (if not hundreds). Hotel will be Le Meridien or Al Bustana (or similar, stayed there, decent). Assuming you're in J or F due to CD reference. If in Y it'll be a shuttle bus but largely the same (different hotel).

As this is primarily a Dubai Connect question refer also this this thread:

https://www.flyertalk.com/forum/emirates-skywards/1404492-dubai-connect-stpc.html