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Old 01-22-2003, 02:55 PM
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MTI MTI is offline
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Join Date: Nov 2002
Location: Scottsdale, Arizona
Posts: 10,627
How many miles on your '84? The O2 light is supposed to come on around 60K, which MB estimated the life of the sensor. You can use the Bosch Mustang 5.0 sensor and save quite a bit. I believe the '84 only had one sensor. Be advised that MB did not provided a "reset" switch for the '84 - '86 sensor light, so unless you like that red glow, you have to remove the bulb from the instrument cluster, which generally requires pulling the cluster.
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