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Old 04-10-2003, 11:05 PM
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Join Date: Feb 2003
Posts: 2
Question SLK230 coolant temp sensor repeat failure

I have had check engine light come on twice, both times they replaced the coolant sensor, the light is on again? Is this known problem for others? Is there hope for a real fix?
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Old 04-11-2003, 07:37 AM
it leaks, its german
Join Date: Mar 2002
Location: raleigh nc
Posts: 1,111
This is a long shot but, take a drop the positive lead of your DVOM in the reserve tank, ground the other and set you range to 20V. If you get a reading over .9 v, you really need to change your coolant, its acting like a rude battery. (seen this drive ford and toyota sensors crazy, for some reason alloy and acid in a glychol bath will do it)

Also make sure to pin out the harness, while I've not seen a SLK 111 harness failure it could happen.

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