W202 temp gauge accuracy

Discussion in 'Engine' started by thephatmaster, Sep 20, 2016.

  1. thephatmaster

    thephatmaster Active Member

    Messages:
    72
    Joined:
    Sep 15, 2016
    Car:
    W202, C200 Saloon, Manual
    hi there,

    I'm thinking of fitting a grille block to my W202 to improve fuel economy (better aero, quicker warm-up). I've had good results with grille blocks on other cars.

    Can I ask, is the W202 temp gauge accurate? it seems to read around (either slightly above or below) 85, whereas my old car would pretend everythibg was fiiiiine and read the correct operating temp "bang on" irrespective of conditions - so was clearly not to be trusted.
     
  2. John Jones Jr

    John Jones Jr MB Enthusiast

    Messages:
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    Joined:
    Mar 23, 2013
    Location:
    London & Dublin
    Car:
    Mazda MX5 10AE, W201 2.5-16, W202 230K Sport man, Honda Accord & Suzuki 'Ricer'.
    From my experience with a 180, a 200 and my current 230K the gauge is spot on. As for a grille block I doubt it's needed or there's any real advantage in fitting one.

    The coolant system working in good order seems first rate. Fresh coolant, a new thermostat, fan coupling and rad cap can transform the way it operates. And for a few quid it's always worth changing the engine temp switch too.
     
  3. John Jones Jr

    John Jones Jr MB Enthusiast

    Messages:
    4,621
    Joined:
    Mar 23, 2013
    Location:
    London & Dublin
    Car:
    Mazda MX5 10AE, W201 2.5-16, W202 230K Sport man, Honda Accord & Suzuki 'Ricer'.
    Just checked my engine temp as I have the OBD connected up most of the time. OBD readout 87C, gauge showing the same.
     
  4. OP
    OP
    thephatmaster

    thephatmaster Active Member

    Messages:
    72
    Joined:
    Sep 15, 2016
    Car:
    W202, C200 Saloon, Manual
    thanks that's good to know.

    just out of interest, what obd tool are you using? I know the Elm327 ones don't work with the W202 but all the others seem super-expensive
     
  5. John Jones Jr

    John Jones Jr MB Enthusiast

    Messages:
    4,621
    Joined:
    Mar 23, 2013
    Location:
    London & Dublin
    Car:
    Mazda MX5 10AE, W201 2.5-16, W202 230K Sport man, Honda Accord & Suzuki 'Ricer'.
    The ELM will work. All you need is an adaptor lead from 38 pin to 16 pin, loads on eBay and only a few quid. . YOu'll also need the lead to use any OBD scan tool. I've a very basic Autel for just engine operation parameters which I leave it in the car and usually hooked up. There's better out there, worth considering getting one that covers also ABS, SRS etc,

    100% Original Autel AutoLink AL319 OBDII & CAN Code Reader ship from USA warehosue
     

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