Hi there,
can someone please help to clarify how many O2 sensors a 1990 300SL-24 has? Looking at part supplier websites (e.g. Pelican Parts) I see that they list an upstream and downstream sensor. Part numbers appear to be different. I know the location of the "downstream" sensor (near the passenger side rear wheel), but haven't heard about an upstream sensor and it's location.
Getting O2 sensor related code 17 (shorted to ground) again so am planning to get a new one (ones).
Thanks much in advance.
Cheers.
can someone please help to clarify how many O2 sensors a 1990 300SL-24 has? Looking at part supplier websites (e.g. Pelican Parts) I see that they list an upstream and downstream sensor. Part numbers appear to be different. I know the location of the "downstream" sensor (near the passenger side rear wheel), but haven't heard about an upstream sensor and it's location.
Getting O2 sensor related code 17 (shorted to ground) again so am planning to get a new one (ones).
Thanks much in advance.
Cheers.