Over a year ago, local MB dealer replaced bank 2 oxygen sensor 2 after CEL and codes 156, 161. The car is '99 ML320. The installed part # is 001 540 28 17, which is O2 sensor fitting 2000-2003 ML55AMG (supercharged V8?????). I should have got #001 540 60 17 (or 001 540 37 17 R/F). I have what appears to be a heater failure on that installed sensor. Same bank, same sensor, code 161 again. Would that ML55 sensor cause this premature O2 heater circuit failure?
Please help me solve this mystery.