Private car drivers generally accept cash tips after completing the ride, though it is still a good idea to check what the company’s tipping policy is. If you are paying with a credit card, the company might add a 10% gratuity to your final bill, along with applicable taxes. Tipping 10% to 20% of the bill shows you appreciate the driver’s service and dedication to keeping you safe. It also contributes to your reputation as a good customer for future services.

Private car service etiquette means refraining from touching the exterior of the vehicle. Opening and closing the doors for you is part of the driver’s job, as is putting your luggage in the trunk or back of the vehicle, depending on the model you selected. Drivers opening and closing the car doors is also a safety precaution, since these professionals have checked the area and determined that it is safe for you to enter or exit the vehicle. 

While it's acceptable to have your newly-purchased groceries in your private car, eating inside increases the risk of seat and floor stains. It also releases food odors into the cabin that get absorbed by the upholstery or leather. To avoid annoying your driver and dealing with messes that you will pay for as part of your service fee, keep food wrapped up.