Picked up the E320 this morning. Everything is back to normal because Mercedes replaced the SBC unit for free under the extended brake system warranty.
Back in 2015 Mercedes replaced the brake reservoir and parts on the E320. My cost was about $1,600. At the time we didn't know about the new brake coverage. When we got the notice in the mail from Mercedes about I called the dealer and he said all I needed was the canceled bank check that I paid with.
Two weeks later I got a check from Mercedes for $1,600.


Safe braking system again