Hey Guys!

I have been stumped with my 1996 E320. She now has 114,000 miles and is driving funny. I get a hunting idle, poor gas mileage, and rpm surges irratically. I have replaced the MAF and checked all wiring and throttle body. All good. I have been advised that the O2 sensor needs to be replaced. There is not CEL on the dash or "Check Engine Electronics" message. I went to look for the O2 sensor and i noticed that there are 2 listed. One that plugs Pre-Cat and one for the Cat Converter itself. Has anyone changed their O2 sensors on an M104 before? Any suggestions would be appreciated! Overall, this old girl is doing great!!!!!

Mike

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My Work:
Mercedes-Benz Manhattan, Inc.
Business Development
536 West 41st Street
New York, NY 10036

-My Garage-
1996 E320: White 118,000 miles ~Dad's Driver~
1996 E320: Green 109,000 miles ~Mom's Driver~
~My Babies~
2000 SL500: Desert Sand 96,000 miles
-Previoulsy Judge Judy's-
2008 E350 4MATIC Sport
-Flint Grey/ Ash/ Black Birds Eye Maple-