First we have granted them access to our homes, now we are giving them the keys to our cars. Like a houseguest that refuses to leave, Amazon is gaining a stronger foothold in our lives by making options for delivery even more convenient.

Expanding on its feature that grants Amazon entry into customer’s homes for package delivery, the online retail giant is now offering to drop customer’s packages off in the trunks and backseats of customer’s cars.

Customers need only place an order, confirming that their vehicle is parked within a delivery location that is also publicly accessible, and expect delivery to occur during the estimated four-hour delivery window.

“We were really happy with the response to in-home delivery,” said Peter Larsen, vice president of delivery technology at Amazon. “What we wanted to do — and it was part of the plan all along — is how we take that beyond the home.”

For now, the service is only available in 37 select cities and to customers with 2015 or newer model cars from brands such as Buick, GMC, Cadillac, Chevrolet and Volvo because their connectivity settings allow these cars to be remotely unlocked. Likewise, customers also need to have an OnStar or Volvo On Call account.

Amazon expects to expand the service in the future to include other automobile manufacturers.

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