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Anyone help me with a part number? (Bosch o2 sensor)

Discussion in 'Electrics, Vacuum, Ignition and ECU' started by ThinkPad, Dec 15, 2012.

  1. ThinkPad

    ThinkPad Senior Member

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    Your Mercedes:
    E W212; C W204
    Upstream o2 sensor for CLS 320 CDI. Thinking if I can get a deal on the sensor, may aswel change it for peace of mind.
    Mercedes refuse to give me the part number for some reason. I have seen an o2 sensor on EuroCarParts at approx £178, whereas the Mercedes part is £235.

    The EuroCarParts is a Bosch item, but shows for the E Class rather than the CLS. Would it be the same part for my car? If not, any recommendations of where I may be able to get one?

    EuroCarParts Part No.: 710221685



    Help greatly appreciated.

    Edit: Also found the above part on another site for £126. So if someone can tell me if it is the right part, would be great! Or tell me how I can find out!
     
    Last edited: Dec 15, 2012
  2. OP
    ThinkPad

    ThinkPad Senior Member

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  3. duncanh

    duncanh Senior Member

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    Why would you want to spend money on something you don't need? I can't see how having a spare O2 sensor would give you peace of mind.

    (Unless you have had a problem diagnosed on a STAR, then I will get back in my box).
     
  4. richardN2O

    richardN2O Senior Member

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    If it ain't broke, don't fix it
     
  5. OP
    ThinkPad

    ThinkPad Senior Member

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    To Clarify

    Sorry the OP was in a response really to a previous thread of mine.

    It came up as fault on the STAR, although there is no CEL on the dash.

    I since have had it checked and cleared, and it re-appeared on OBD2 test machine. So the fault is definitely current. Although, couldn't say have noticed any ill effects, but having only just bought the car who knows - maybe I should be getting better economy or performance but just don't know it...
     
  6. RUXLEY

    RUXLEY Senior Member

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    exact same fault as you , did you get this fixed ?
     
  7. OP
    ThinkPad

    ThinkPad Senior Member

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    Hi
    Sorry for the delay in response.

    I have now had the o2 sensor changed. Mainly due to just being pedantic about things, and not feeling happy about having a current fault code stored.

    However, after the change, NO difference at all in the drive, the performance or the economy. (May be lower economy in fact - but I attribute that to the cold weather rather than anything to do with the sensor).

    When the mechanic changed the part, he did frankly tell me majority of these cars come up with this fault, and he actually advised me not to bother. We also have another CLS CDI in the family, which also comes up with o2 sensor fault of some sort.

    CONCLUSION:

    Leave it as it is. If the CEL comes on, then check to ensure nothing more serious. But if just o2 sensor faults, I really would not bother.

    Hope that helps.
     
  8. RUXLEY

    RUXLEY Senior Member

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    did the code go though after replacement ?
     
  9. OP
    ThinkPad

    ThinkPad Senior Member

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    Yes it did. In the past if I cleared the code it would come back after a drive. Last time I checked was a couple of weeks after changin the part and it hasn't come back.
     
  10. RUXLEY

    RUXLEY Senior Member

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    cheers might try and get it changed under warranty then.
     
  11. EmilysDad

    EmilysDad Senior Member

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    It's so you don't get the part number from them & then go online or to ECP ;) & buy it from them instead. Having said that, I have been given a part number from a MB dealer (the Smart side of MB) so I could check up on availability at A N Other MB dealership (Some MB won't discuss Smart parts even though some bits are the same ;) )
     
  12. RUXLEY

    RUXLEY Senior Member

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    Indeed £235 from Mercedes or £53 from motor factors genuine merc part :lol:
     
  13. EmilysDad

    EmilysDad Senior Member

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    You do need to be careful though sometimes. I've not had my Merc for long enough to be able to say for MB, but for Vauxhall bits it's generally cheaper in the long run to bite the bullet & buy OE rather than use pattern parts that fail early eg crank shaft sensors. And just because a part is made by the same firm that makes OE, it doesn't mean they're the same eg Heinz make HP beans, but they're different from Beanz ;);)
     
  14. c15htn

    c15htn Senior Member

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    Emilys Dad, i don't think anyone on here would buy just any old motor factor part.....
    They seem quite a discerning bunch and seem to aim for Bosch etc - which are likely to be good quality parts in their own right.

    I must admit, for this particular car I've elected to do the same :D
     
    Last edited: Mar 6, 2013
  15. EmilysDad

    EmilysDad Senior Member

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    I agree on both counts. ;) ;)
     
  16. RUXLEY

    RUXLEY Senior Member

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    Last edited: Mar 6, 2013

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