Location/Hours and Directions

We are located at:
6224 Highway 100
Washington, MO 63090

Toll Free: 1-800-748-7851
Local: 636-239-6777


At Modern Auto Company, we strive to make our customers happy. Below, you can see our hours of operation, and also get step-by-step driving directions from your doorstep to ours. While you are at Modern Auto Company, you can see our extensive inventory of new and used Cadillac, Pontiac, Chevrolet, GMC, and Buick automobiles. We work hard to get you into the vehicle you have always wanted. That new Cadillac, Pontiac, Chevrolet, GMC, or Buick is waiting for you, and we deal with a wide variety of lending sources to make sure you will get the most complete and comprehensive car loan and auto financing package available in the Washington, St. Louis, O'Fallon, Ballwin, and Chesterfield areas.

Sales Hours

  • Mon, Wed, Fri: 8:00 am - 8:00 pm
  • Tues, Thurs: 8:00 am - 6:00 pm
  • Saturday: 8:00 am - 4:00 pm
  • Sunday: Closed

Collision Center Hours

  • Monday - Friday: 7:00 am - 5:00 pm
  • Saturday: Estimates by appointment
  • Sunday: Closed

Parts Hours

  • Monday - Friday: 7:00 am - 5:00 pm
  • Saturday: 8:00 am - 12:00 pm
  • Sunday: Closed

Service Hours

  • Monday - Friday: 7:00 am - 5:00 pm
  • Saturday: 8:00 am - 12:00 pm (Office Only)
  • Sunday: Closed
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