how many o2 sensors are on a 1997 e320 and how can you tell when they are bad.
thank you bill!!!!!!

There are 2 on a 1997 E320
They will turn the check engine lamp ON!
IF you live in an area with emission testing the car won't even pass if they are weak!

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator