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Old 10-28-2001, 03:38 PM
Registered User
Join Date: Jul 2001
Location: U.S.A.
Posts: 250
changing o2 sensor

I need help! I am trying to replace the o2 sensor on my 1982 280e. I can't get the old one out. I am using a special o2 socket with a 1/2" drive breaker bar but I can't budge the thing. I think it is the original sensor--not replaced in more than 15 years. I have already soaked it in liquid wrench and have also tried heating the part of the exhaust, but no luck. I am afraid I will strip the outside of it if I use much more force. Any ideas would be much appreciated. Also, will I cause any damage if I just leave it there (already cut the wires), and run the car in open loop?
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Old 10-28-2001, 03:56 PM
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
Your car never came with an O2 sensor. Most of the added systems died years ago. If the system isn't working the old sensor is doing a fine job: of plugging the hole.

Before I would worry about the sensor, I would verify the system and whether it still has control.
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
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Old 10-28-2001, 07:01 PM
Registered User
Join Date: Jul 2001
Location: U.S.A.
Posts: 250

thanks for the advice. I spent about five hours and broke a socket adaptor trying to get that thing out of there. I also bought a replacement sensor for about $20 that I will keep as a souvenir.
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