Originally Posted by Izzy3
The catalog lists it as an additional tail lamp which fixes at the bottom of the the license plate frame. My current tail light (OEM) doesn't flash, is above the license plate and is smallish to say the least.
You're talking about the "Supplemental Brake Light".
At $170 with the wire harness its pricey, but works great.
As for an additional "supplemental" brake light there are dozens of other options and you need not worry about the CANBUS as it's a load sensor withing the ZFE that triggers the LAMP Out error and that is already set to LED on 2008 and newer models.