NHTSA Complaint #11373892 — 2016 MERCEDES-BENZ SPRINTER 3500

WHEN I WENT TO TRY THE 4 WHEEL DRIVE THE FOLLOWING THINGS HAPPENED: A CLUNKING SOUND IN THE REAR OF THE VEHICLE. NUMEROUS WARNING LIGHTS CAME ON . ABS, COLLISION AVOIDANCE, CRUISE CONTROL, CHECK ENGINE, ESC OR ESP. OVER TIME THE LIGHTS CLEARED BUT CAME BACK ON WEEKS APART. I AM A RETIRED NASA SAFETY/RELIABLY ENGINEER. IN MY OPINION ALL OF THESE LIGHTS COME ON AS A RESULT OF FAILURES OF ONE OR MORE WHEEL SPEED SENSORS. THIS IS A MAJOR SAFETY PROBLEM AS WHEN THERE IS A FAILED OR INTERMITTENT OPERATION OF A FAILED SPEED SENSOR. ALL OF THESE SAFETY SYSTEMS FAIL WHEN THE ONE SENSOR FAILS. THIS FAILURE COULD OCCUR UNEXPECTEDLY AT ANY TIME. LEADING TO LOSS OF LIVES AND VEHICLE. I HAVE NOT RECEIVED ANY WARNING LETTERS ON THIS MAJOR SAFETY FAILURE. ACCORDING TO THE DEALER MERCEDES IS AWARE OF THIS ISSUE. AFTER THE VEHICLE IS OUT OF WARRANTY MERCEDES SAYS THEY WILL CHARGE THE OWNER TO FIX IT. AT THE VERY LEAST THE ISSUE CLEARLY NECESSITATES THAT THIS ISSUE BE ELEVATED, TO CONSUMERS, AND THAT THE ISSUE BE FIXED . A WARNING THAT DESCRIBES THE ISSUE AND MERCEDES STATUS ON A FIX SHOULD GO OUT TO ALL THE APPROPRIATE PARTIES IMMEDIATELY. THE VEHICLE WAS STOPPED PUT IN NEUTRAL THEN 4 WHEEL DRIVE WAS ENGAGED, IMMEDIATELY WHEN MOVING THERE WAS A BIG CLUNK AND THE WARNING LIGHTS CAME ON. THEY WENT OUT THEN CAME BACK ON INTERMITTENTLY FOR MONTHS. ONE TIME THEY CAME ON JUST SITTING AT THE LIGHT. FAILURE OF MULTIPLE SAFETY SYSTEMS DUE TO A SENSOR FAILURE IS UNACCEPTABLE. I BELIEVE A DESIGN FIX IS URGENTLY NEEDED AND SHOULD BE PRESSED FOR HARD BY THE GOVERNMENT. CURRENTLY THERE IS NO FIX. AND MERCEDES IS NOT ADEQUATELY WARNING THE PUBLIC OF THE ISSUE. UNTIL I PRESSED MERCEDES HARD ON THIS INTERMITTENT PROBLEM I WAS NOT MADE AWARE OF WHAT EXACTLY THE PROBLEM WAS. THE FAILURE OF ONE SENSOR SPEED CAUSES MULTIPLE SAFETY SYSTEMS TO NOT WORK.