THIS VEHICLE HAS HAD 4 SEPARATE WHEEL SPED SENSOR FAILURES. WHEN EACH INCIDENT OCCURRED, THE VEHICLE WILL ACCELERATE ON ITS OWN AND AT THE SAME TIME THE ABS WILL NOT ALLOW FULL BRAKING PRESSURE WHILE UNDERWAY. YOU WILL HEAR THE ABS SOUND LIKE IT'S SLIDING ON A SLIPPERY SURFACE IN ANY CONDITION. AS THE VEHICLE ACCELERATES AND BRAKING PRESSURE IS GREATLY REDUCED, IT IS SOMETIMES NECESSARY TO QUICKLY SHOVE THE VEHICLE IN NEUTRAL TO KEEP FROM HITTING ANYTHING AHEAD. WHEN THESE FAILURES OCCUR IT CAN BE AT ANY SPEED OR ON ANY SURFACE. THIS VEHICLE WAS PURCHASED NEW AND NOW HAS APPROXIMATELY 45,000 MILES. OCCASIONALLY, PRIOR TO THE DASH LIGHTS INDICATING A WHEEL SPEED SENSOR FAILURE, THE VEHICLE WILL ALSO CUT ALL POWER. THIS TYPICALLY HAS HAPPENED ON HARD ACCELERATION ONTO A HIGHWAY, BEING EQUALLY DANGEROUS TO DRIVE. THE VEHICLE IS JUST GOING OUT OF WARRANTY AND I HAVE TRIED TO WORK OUT A SOLUTION WITH MERCEDES WHO HAVE NOW STATED I HAVE NO CLAIM. A FINAL FACTOR IS THAT AT ABOUT 10,000 MILES THIS VEHICLE HAD A MASSIVE SHORT THAT LITERALLY MELTED THE BATTERY DOWN. I HAVE SUGGESTED TO MERCEDES THAT THAT INCIDENT, UNDER WARRANTY, MAY HAVE DONE SEROUS HARM TO THE ENTIRE ELECTRICAL SYSTEM/COMPUTERS.