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  1. C

    When I boot it my coolant temp drops on my gauge (c220 2011)

    The thing is this isn't normal behaviour for the vehicle I pay attention to my gauges probably more than I should but this issue has recently developed, I guess it's time to book it in with the dealer and hope they can find something, the temp is clearly dropping on the gauge not instantly but...
  2. C

    When I boot it my coolant temp drops on my gauge (c220 2011)

    I don't have access to star so I guess it's a dealer job? Sent from my iPhone using Tapatalk
  3. C

    When I boot it my coolant temp drops on my gauge (c220 2011)

    The temp may have crept up a couple of degrees, but I took it out earlier and it's dropping off slowly even normal driving, it's almost as if it's cooling too well .... Sent from my iPhone using Tapatalk
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    When I boot it my coolant temp drops on my gauge (c220 2011)

    When I accelerate hard and then coast or slow down to normal speed my coolant temp seems to drop off on the gauge any help would be great I've already changed the thermostat and changed the coolant switchover valve Sent from my iPhone using Tapatalk
  5. C

    Erratic temperature gauge

    Steve, checked my batteries today on the tester at work and they are both fine state of charge was ok on the big battery too, tomorrow is d day I'll either make the call to do the pump or I'll replace the valve and go from there will let you know what I find Sent from my iPhone using Tapatalk
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    Erratic temperature gauge

    I haven't drop tested mine but I loaded up the hidden screens within command as it will show you battery voltage, mine was reading a low 12v but defo was charging so I will put the battery tester from my work on it first thing in the morning.. I'm still thinking water pump is a possibility as...
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    Erratic temperature gauge

    I'm not loosing any coolant ATM and there are no fault codes stored either this is a very strange one Mercedes have suggested water pump hence ordering one but will check battery voltage as that could and it's a long shot be the issue I shouldn't think yours is the original battery like mine...
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    Erratic temperature gauge

    I've ordered a new water pump and valve as a precaution although it's not overheating it's doing my head in as I know it's not right, but will check battery voltage as a precaution before I start replacing either pump etc Is yours still playing up? Sent from my iPhone using Tapatalk
  9. C

    Erratic temperature gauge

    Steve Has your alarm been going off at all? Mine has just started to do so, I am wondering whether battery voltage could be an issue.... Sent from my iPhone using Tapatalk
  10. C

    Water pump failure

    Grober just a thought I remember when I code read my car there were no fault codes but the battery voltage was 11.9v on the diag machine and last two days my alarm has been going off randomly, could this temp issue and alarm going off be down to battery voltage being too low? I'm presuming the...
  11. C

    Water pump failure

    Yeah trying to get my head around it is complex and very frustrating I replaced the thermostat the other day and problem is still there, I've ordered a new water pump and coolant switch valve but I'm agreeance with you that the pump is over cooling .... Sent from my iPhone using Tapatalk
  12. C

    Water pump failure

    Grober I've just seen your post on a previous thread, if the pump can be decoupled at the same time could the pump get stuck? I'm still trying to understand and diagnose the fluctuation in my temp gauge Sent from my iPhone using Tapatalk
  13. C

    temperature guage fluctuating ,overheating problem w204 c200

    What was the issue in the end with the gauge fluctuating? Sent from my iPhone using Tapatalk
  14. C

    Water pump failure

    Yeah we all know they are a weak point on the engine, but it isn't pissing water out like others have said which would indicate it's not failed But what I'm wanting to know is if other people have experienced any other symptoms for them to fail other than they are simply leaking... Sent from...
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    Erratic temperature gauge

    Steve, coolant pump switchover valve mean anything to you? Sent from my iPhone using Tapatalk
  16. C

    Water pump failure

    That could be a possibility and would explain the symptoms although I thought it was the water pump that was variable be cheaper than replacing the water pump though maybe the next step Sent from my iPhone using Tapatalk
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    Water pump failure

    Are they common for leaking though or for showing the same signs as I've got when they fail Sent from my iPhone using Tapatalk
  18. C

    Water pump failure

    I guess I'll have to bite the bullet and fit a new one with the hope that it cures it, there's lots to suggest the pump is the issue but it's that slight bit of what else could it be., that's causing me to tip toe around it Sent from my iPhone using Tapatalk
  19. C

    Do I pay for a B service?

    When was the car registered? Not saying this is the case but should go from when registered , right up until the 28 Feb 2016 it will be a 65 plate which would mean that 28feb 2017 the car is a year old, could be a late registered car that's gone past its annual service date which if that's the...
  20. C

    Water pump failure

    Plus if it was a faulty sensor the range of temp drop would be far greater and surely would spike upwards in excess of 90deg? Sent from my iPhone using Tapatalk
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