FazTaz

Where do I place my EZpass in my 2003 S500. When I put it under the rearview mirror it never reads!

BenzE

I don't know that much about the S class. Does it have a heated windshield? You might need an exterior tag.

If you have the rain-sensing wiper, make sure that you place the EZ-Pass beneath the dotted screen that surrounds the mirror.

Otherwise, maybe you need a new tag? They only live for a couple of years.

fcoxwell

The manual has a section on the infra red windshield that shows the blank spots for placement of the ez pass.