BAS/ESP repair necessity

My ML320 owners manual had a reset process for this. It happens when you unhook for any reason or change battery if you have done that. Unfortunately I don't have my ML320 or the book.

you likely do not have any brake lights; you positively do not have Brake Assist, Electronic Stability Program and also may not have Anti Lock Brakes. the answer is YES, it is hazardous. you FIRST need to have someone scan all the diagnostic modules for codes. you may have another issue.