If you’re about to hop behind the wheel of your rental car but don’t know all that much about Mercer, don’t stress. Here’s a bit of basic info to get you started.Mercer is an island of United States of America. Its shimmering shorelines and salty sea breezes are calling your name!If you’d like to get some local advice on things to check out, you shouldn’t have much trouble. The island is home to about 1,950 friendly locals who can steer you in the right direction.