Check Coolant Level Warning
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Joined: Jul 2008
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e550
Check Coolant Level Warning
Did a quick search and couldn't find anything for W211.
I have a W211 E550 and have a "check coolant level" warning. I checked the coolant level and it is full.
Any other reason that may cause the coolant level to be low? I read on other Mercedes models that it can be low washer fluid, washer fluid sensor went bad, or coolant sensor went back.
How difficult would it be to replace one of those sensors?
Thanks!
I have a W211 E550 and have a "check coolant level" warning. I checked the coolant level and it is full.
Any other reason that may cause the coolant level to be low? I read on other Mercedes models that it can be low washer fluid, washer fluid sensor went bad, or coolant sensor went back.
How difficult would it be to replace one of those sensors?
Thanks!
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,225
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From: V E G A S
1922 Ford Model T / no OBD
The coolant/washer fluid sensors on the same circuit were in older models.
W211 has separate circuits and I just had washer fluid warning that went away after adding fluid.
Is the warning consistent? Meaning happen every time you restart the car, even in the middle of a day?
I would add a cup of distillate water just to make sure it is bad sensor or real low level.
W211 has separate circuits and I just had washer fluid warning that went away after adding fluid.
Is the warning consistent? Meaning happen every time you restart the car, even in the middle of a day?
I would add a cup of distillate water just to make sure it is bad sensor or real low level.
Thread Starter
Junior Member
Joined: Jul 2008
Posts: 26
Likes: 0
e550
The coolant/washer fluid sensors on the same circuit were in older models.
W211 has separate circuits and I just had washer fluid warning that went away after adding fluid.
Is the warning consistent? Meaning happen every time you restart the car, even in the middle of a day?
I would add a cup of distillate water just to make sure it is bad sensor or real low level.
W211 has separate circuits and I just had washer fluid warning that went away after adding fluid.
Is the warning consistent? Meaning happen every time you restart the car, even in the middle of a day?
I would add a cup of distillate water just to make sure it is bad sensor or real low level.
Cool. That knocked 2 things off the list (washer fluid and washer fluid sensor).
I just added some distilled water yesterday and the sensor is still on.
The only option is to buy a new sensor? Does Mercedes sell the sensor itself or do I have to buy the whole reservoir?
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,225
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
I have never seen that sensor out, so don't know, but do more tests.
I believe the sensor is off when closed. So pull the plug and put jumper on it.
See if the light goes off. If it does, that confirms sensor, if not, you have some connection problem.
I believe the sensor is off when closed. So pull the plug and put jumper on it.
See if the light goes off. If it does, that confirms sensor, if not, you have some connection problem.
Thread Starter
Junior Member
Joined: Jul 2008
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e550
$21.95 for OEM part or $16 for aftermarket.
https://www.carpartsdiscount.com/cat...tml?3593=72445
