True, but watch out for the usual chicanery from car hire firms.
I rented an E-class from Avis a couple of years ago, with built in satnav, but in turning it on it showed “no maps loaded” and no option to download them over the air. The office claimed since I hadn’t specifically ordered satnav, no maps, and if I wanted it, I’d have to pay. Some remonstration at the office yielded - for free - a Tom Tom the size of a brick, with maps a few years out of date. In trying to plug that in, I found the SD card slot for the maps, with a card, but it wasn’t seating properly, so I enquired about that. One of the service chaps came along with a high tech piece of paper, which was neatly folded and wedged into the reader with the card. Voilá maps.
On a related note, it’s worth looking into an app called what3words. It’s not so much a navigation tool (but it will connect to google maps, etc.), as a location tool, but it can come in handy when post codes don’t work properly, and places don’t appear in the points of interest lists.