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I have been getting this message(in the picture) on my dash everytime I drive the car. As soon as I fire up the cooling fans are on high! I checked the coolant level, it was slightly low, so I topped it up. Let it sit then went out for a drive. Exact same thing.
According to the manual it could be the coolant temp sensor, low coolant levels or a malfunctioning fan. I know it's not the fluid level because I topped it up, the fan is work, so I ordered a temp sensor this morning. Doing my due diligence I wanted to find some info on how to change it. I can't even find where it is on the engine. Anyone got any suggestions on where it is? Or a link to pics/videos of where it is??
**EDIT**
Not sure if it makes a difference but the temps in AZ just took a nose dive and this seemed to coincide with that timing wise. Not sure if that makes a difference or not.
Thanks!!!!
Last edited by 2k17E3oo; Dec 14, 2021 at 04:26 PM.
Changed out the coolant temp sensor. Did nothing. Anyone got any ideas?? Driving around with this thing sounding like an over heating junker is not it....
If you have ability erase codes do so and see if they return. Coolant symbol is odd normally CEL would display. Current CPS part # is 2709051300. But before going any further I suggest having someone with Xentry (MB diagnostics) check it.
If you have ability erase codes do so and see if they return. Coolant symbol is odd normally CEL would display. Current CPS part # is 2709051300. But before going any further I suggest having someone with Xentry (MB diagnostics) check it.
I dont have a scanner at the house to do that. Can I disconnect the - battery terminal for a while and get the dame result?
I dont have a scanner at the house to do that. Can I disconnect the - battery terminal for a while and get the dame result?
hi, did you find out what the problem was? I have an e350 2019 with the same message while all fluids are on the arrow. I went to the dealer but they couldn't find anything..
hi, did you find out what the problem was?
I have an e350 2019 with the same message while all fluids are on the arrow.
I went to the dealer but they couldn't find anything..
Do you hear your engine fan running full blast as well ?
The dealer couldn't find a thing does not help much.
> If you own the car: Do your own scanning, chech engine temp data PIDs
> If you lease: CYA! Document the failures and attempts.
Do you hear your engine fan running full blast as well ?
The dealer couldn't find a thing does not help much.
> If you own the car: Do your own scanning, chech engine temp data PIDs
> If you lease: CYA! Document the failures and attempts.
I can hear the fans are spinning. I noticed that it only gets the yellow coolant message in warm weather. Engine and coolant temp is at operating temperature. dealer has replaced the contact points and the active grill shutters but no success
Last edited by mercedesw213; Jul 19, 2022 at 02:33 AM.
dealer found nothing billable... electrical glitch?
It seems this temperature sensor is being read wrong in odd circumstances. It's unusual for the ECU itself to get goofy like F-SAM can.
That sets suspicion on the sensor side, unless you can locate a known repair TSB.
Are you familiar with MB leaky sensors ?
Usually it involves engine oil in ECU harness... Inspect for sign of coolant in sensor connector and ECU harness.
It seems this temperature sensor is being read wrong in odd circumstances. It's unusual for the ECU itself to get goofy like F-SAM can.
That sets suspicion on the sensor side, unless you can locate a known repair TSB.
Are you familiar with MB leaky sensors ?
Usually it involves engine oil in ECU harness... Inspect for sign of coolant in sensor connector and ECU harness.
could it be the temperature sensor itself? Mercedes is from 2019 and only 40,000 km young. I have a 2 year mercedes warranty, but the mechanics who work there don't seem to be really experienced with the newer techniques
could it be the temperature sensor itself?
Mercedes is from 2019 and only 40,000 km young. I have a 2 year mercedes warranty, but the mechanics who work there don't seem to be really experienced with the newer techniques
If the sensor or its wiring were going bad, there would be a specific active fault about: open, inconsistent or shorted sensor.
If that error was random, the fault would be archived by date and mileage.
It's up to who looks at all these data to act on them, spend the time to understand the issue or mess with the wrong parts and get a call back...
it's better to work on $800 oil change and $2500 brakes: no challenging wizardry!
Give the dealer 2 fair attemps then reach for the Service Mgr and MBUSA well within your warranty coverage.
🤞
Last edited by CaliBenzDriver; Jul 20, 2022 at 02:47 AM.
If the sensor or its wiring were going bad, there would be a specific active fault about: open, inconsistent or shorted sensor.
If that error was random, the fault would be archived by date and mileage.
It's up to who looks at all these data to act on them, spend the time to understand the issue or mess with the wrong parts and get a call back...
it's better to work on $800 oil change and $2500 brakes: no challenging wizardry!
Give the dealer 2 fair attemps then reach for the Service Mgr and MBUSA well within your warranty coverage.
🤞
I gave the dealer 4 tries. the first time they only checked the coolant level. 2nd time they replaced the active grill shutters. 3rd time they replaced the connection points of the active grill shurters and on the 4th time they performed a software update on the air conditioning part because there was a malfunction and a new software. but so far nothing has fixed it. I live in the Netherlands and unfortunately they are not that knowledgeable here. no error messages have been reported when reading out, if an error message appears then it is again related to the active grill shutters. I noticed in the morning bij the first start that there is no notification. but after noon when it gets hot outside, the message appears right after starting the car.
I just got this last month on my 2013 204 AMG C63. The switch and fan needed to be replaced. I have LTH with extended O2s and the extension wires had fraid a bit (they were 8 yrs old. an exposed section was able to touch the exhaust and throw electrical spikes in the system including the ECU which threw this code. Initially after replacing the fan and the fan switch the code came back after a day, and we were able to track this down. Once we replaced those extensions, it has not come back and temps have been where expected, sounds crazy but true story
OP - Have you checked/replaced your thermostat? I've had to replace mine twice in the 158,000 miles i've driven my E300. I'm replacing it again as soon as I get a new one from MB in 2-3 days because my fan has been kicking on constantly. The thermostats are a nightmare on the M274 from my experience (and I have two E300's. both are the same issues).
OP - Have you checked/replaced your thermostat? I've had to replace mine twice in the 158,000 miles i've driven my E300. I'm replacing it again as soon as I get a new one from MB in 2-3 days because my fan has been kicking on constantly. The thermostats are a nightmare on the M274 from my experience (and I have two E300's. both are the same issues).
FYI: Are you positive a 3rd thermostat will help your engine remove accumulated heat ?
Do you get fan constantly going regardless of Winter/Summer ?
FYI: Are you positive a 3rd thermostat will help your engine remove accumulated heat ?
Do you get fan constantly going regardless of Winter/Summer ?
It's a known issue where M274 thermostats fail. First time the fan was kicking on constantly. Second time I got a CEL saying the thermostat is faulty. Now I have my fan kicking on again all the time (I've replaced my fan with an OEM unit, and had it tested twice, so it's not the fan). Both times i've changed the thermostat, the issue went away.
It's a known issue where M274 thermostats fail. First time the fan was kicking on constantly. Second time I got a CEL saying the thermostat is faulty. Now I have my fan kicking on again all the time (I've replaced my fan with an OEM unit, and had it tested twice, so it's not the fan). Both times i've changed the thermostat, the issue went away.
How long can a new thermostat cool your engine enough to keep the fan stopped in Winter?
How long can a new thermostat cool your engine enough to keep the fan stopped in Winter?
I don't understand your question. A thermostat fails by either the plastic becoming brittle and causing leaks, the internal heating element fails, or the valves don't open or close when they should.
As for your question - If i'm understanding correctly - It should keep it cool until it needs to kick on the fan... Not sure how to answer that. The temp sensors tell the fan when to kick on if they need to. New thermostat or not.
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