5 /5 Tina Andruss: Apparently when batteries (there are 2) are approaching failure on S-class Mercedes, alerts go berzerk. Our car completely shut down. After a 40 minute wait it returned to drivable, we contacted shop, and Danny said "bring it in now". He deployed his diagnostic computer, (low batteries), ordered and replaced same day, and we were safe to make our 9 hour trip back home to San Diego. Wonderful experience! Hes top-qualified Mercedes mechanic.