Any idea what a new thermostat and sensor should cost ? - Mercedes Benz SLK Forum
SLK R171 General Discussion SLK 200, SLK 280, SLK 300, SLK 350, SLK 55 AMG

 
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#1 Old 2 Days Ago
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Any idea what a new thermostat and sensor should cost ?

Including install from an independant Mercedes shop ? As of today getting P0128 error. Engine water temp seems ok at 88 to 90 degrees C), (w/ outside temp 68 degrees F ) coolant level is good. I suppose it would be interesting to watch how long it takes for the engine coolant to get to 88 C after a cold start in the morning since that might indicate whether this is stuck thermostat or defective sensor. Presume either way one ends up paying the same to fix it.
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I had the same issue, thermostat and housing (non OEM) £101, 1.5 hours labour to fit.
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Dealer list price for the t-stat here in the US is $170.
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MBpartscenter.com has the thermostat for 123.42

COOLING SYSTEM for 2011 Mercedes-Benz SLK300

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Today I timed the temp rise from first start of the day....took about 5 minutes to go from cold to 80 degrees C, then another 2 minutes to 85 C... this at 45 mph, outside temp of 88 degrees. Seems "normal" to me....don't understand why it threw the error code....
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That is definitely in the normal range. As for the error code. It's a Mercedes !!!

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Originally Posted by WoZ53 View Post
That is definitely in the normal range. As for the error code. It's a Mercedes !!!
Took it to the independent German (mostly Mercedes) car place yesterday and guy at the desk (i.e. I don't know how much he really knows) says the Mercedes computer takes a number of things into consideration to throw this code..including the fuel ! That peaked my interest as I bought a tank of suspect fuel recently (only occurred to me later it might be suspect due to "middle of nowhere" nature of the station). Anyhoo, they take it in and then proclaim, yes, needs new thermostat, $425 to do it all. So then I think maybe I should try new tank of fuel first and leave.

(having said that, the car ran perfectly on that suspect fuel...no knocks or other issues)

To my surprise the check engine light is off when I leave the repair shop...guess they reset it. Anyhoo, put known "busy station" fuel in and will wait to see if the light comes back on. The error code just makes no sense considering it runs perfect, comes up to proper coolant temp in time and stays at 88 C thereafter, so wondering if indeed, fuel quality could effect the computer calculations somehow....we'll see.

========

As an aside....do these cars not have an oil pressure gauge ?
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Originally Posted by As an aside....do these cars [I
not[/I] have an oil pressure gauge ?
I believe the 55's have something but my 350 certainly doesn't. No oil pressure gauge, no idiot light, no warning via the dash display. So much for "The Best Or Nothing". We got nothing!
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Originally Posted by carguy View Post
I believe the 55's have something but my 350 certainly doesn't. No oil pressure gauge, no idiot light, no warning via the dash display. So much for "The Best Or Nothing". We got nothing!
My 2005 350 provides a message when the oil is low. See page 360 of the operating manual.
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From the owners manual
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