My wife and I are being put up in a very fancy Chicago hotel this weekend, and for our dinner appointment, the hotel's house car (a Mercedes sedan) will be dropping us off and picking us up. Â Moving in this world is a pretty new experience for me, and I'm not sure how much, if anything, to tip the driver of the sedan. Â The hotel calls the service "complimentary," and I don't want to offend the driver if tips are gauche in this case. Â On the other hand, if they're not, what would the proper gratuity be for a short sedan ride? The same as I might pay had it been a cab ride? Also, can any of you recommend a solid, modern book of etiquette? Â I have a lot of probably embarrassingly elementary questions about hotel/retaurant etiquette, etc. and would love to have some sort of easy reference on hand. Thanks.