2003 Mercedes-Benz ML500 Q&A
2003 Mercedes-Benz ML500 Question: BAS ESP ON
First you need to invest thousands of dollars into an OE diagnostic computer with lots of training material and run a system check to see what could be the cause. Sometimes there is a bad connection at the control unit due to corrosions, but it could be a bad sensor. I'd suggest to take it to a MB specialty shop to diagnosed it correctly. Zee - ZeeTech
The ESP and BAS warning lights may illuminate due to a failed brake light switch. Replacement of the failed switch should correct this concern. A recall on certain 2002 models have been recalled ...