Coolant Temperature Reads 0
11-19-2023, 07:25 PM
#1
Newbie
Thread Starter
Join Date: Nov 2023
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
W.211 E320 CDI
Coolant Temperature Reads 0
On my '03 E320 CDI the coolant temperature Guage is not showing a value no matter how hot the engine gets. I've replaced the coolant temperature sensor, and an OBD2 reader displaced an accurate temperature reading. My next suspect is the guage itself, but is there something else I should check before replacing the instrument cluster? Any advice would be greatly appreciated
11-23-2023, 12:19 PM
#3
MBWorld Fanatic!
Join Date: Jan 2016
Location: In the Shadow of the Tetons
Posts: 2,307
Received 678 Likes
on
491 Posts
2013 ML350 Bluetec
IIRC there's a gauge test via xentry/launch/whatever decent computer you have that does 2 way comms with the car to see if the gauge will sweep from min to max.
Then look into who can rebuild your existing cluster for pennies compared to the hassle of replacing it.
Then look into who can rebuild your existing cluster for pennies compared to the hassle of replacing it.
The following users liked this post:
CaliBenzDriver (11-24-2023)
11-24-2023, 01:40 AM
#4
MBWorld Fanatic!
Join Date: Apr 2019
Location: Silicon Valley
Posts: 5,403
Received 3,336 Likes
on
2,220 Posts
MY'14 W212 M276 3.5NA @55kMi
lazy temp gauge
You have tested the ECT sensor to be good as seen by ECU but gauge is still acting up...
#3 highlights everything you need as next step towards solving your gauge issue WITHOUT NEW/USED IC display... (Odometer PITA!).
else post your test findings
🤞
#3 highlights everything you need as next step towards solving your gauge issue WITHOUT NEW/USED IC display... (Odometer PITA!).
else post your test findings
🤞
11-25-2023, 03:01 AM
#5
Correct me if I'm mistaken, but if we get used IC, and swap the rear circuit board from the original IC where the wiring harness connects to, odo should show correct reading and there is correct VIN.
If so, that's quite easy 15 min job.
If so, that's quite easy 15 min job.
11-26-2023, 02:07 PM
#6
MBWorld Fanatic!
Join Date: Apr 2019
Location: Silicon Valley
Posts: 5,403
Received 3,336 Likes
on
2,220 Posts
MY'14 W212 M276 3.5NA @55kMi
mix and match ✌️
It will work if the issue is not on the circuit board itself but with dial. That's a good way to find out.
If the used replacement is gonna work then try to lube the dials because it's nearly as old as the failed original. You won't have to revisit again later.
