ML 2002 HEATER

si69b

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Can anybody tell me a reason why my car heater doesn't seam to be as hot as it should be. Is there something I can do to increase the hot air output eg changing filters etc.
 

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What temp is the engine running at,,,if under 80c it will feel very cold
 
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si69b

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What temp is the engine running at,,,if under 80c it will feel very cold

I've driven from Penrith to Leeds this morning and it was warm in the car but the heat coming out of the vents didn't seem hot. Also the rear vents seem to be even blowing colder.
 

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We still need to know what temp the engine is running at as warm air is cooled rapidly when blown, and quite a heat loss
 
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si69b

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We still need to know what temp the engine is running at as warm air is cooled rapidly when blown, and quite a heat loss

It wasn't running at 80, I would say around 60 degrees.
 

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Then you have your answer Sir,,, change it and the car will get hot and the fuel consumption will improve dramatically.

If have the instructions if you are into this sort of thing
 
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si69b

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Then you have your answer Sir,,, change it and the car will get hot and the fuel consumption will improve dramatically.

If have the instructions if you are into this sort of thing

Change what???
 

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Sorry silly me :Oops:, the engine thermostat :D
 

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Is it an easy thing to do?

I think so, the new one will have to come from MB I can send you the papers and you can take a look, but I cannot send till Monday, would you mind asking again then
 
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si69b

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I think so, the new one will have to come from MB I can send you the papers and you can take a look, but I cannot send till Monday, would you mind asking again then

Thanks. I'll contact you on Monday with my email address for you to send me details of how to change it.
Thanks again
 
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si69b

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I think so, the new one will have to come from MB I can send you the papers and you can take a look, but I cannot send till Monday, would you mind asking again then

Sorry it's taken so long to get back to You. I've just completed a 250mile 4 hour journey without stopping and the temperature gauge didn't rise above 60 degrees. Is it possible for you to send me the instructions of how to change the thermostat.
Thanks
 

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Hi malcom just thought would bounce this off you car comes in w203 c220cdi no heater engine approx 40dc replaced thermostat now runs at 88dgc, but only slightley warmer?:confused:
 

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Sorry it's taken so long to get back to You. I've just completed a 250mile 4 hour journey without stopping and the temperature gauge didn't rise above 60 degrees. Is it possible for you to send me the instructions of how to change the thermostat.
Thanks

Yes I can send it to you :D
 

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Hi malcom just thought would bounce this off you car comes in w203 c220cdi no heater engine approx 40dc replaced thermostat now runs at 88dgc, but only slightley warmer?:confused:

This I believe is a flap problem on the 203, you could try a re set as in the DIY,but a motor could be at fault.
 


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