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1982 380SEC, 2014 ML350 4Matic
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103 Posts
Discussion Starter #1
1999 320, not 4matic. Replaced water pump and pulleys. Now I have a check engine light, but all vacuum hoses and tubes look good. Also, engine temp gauge not working. I believe that I broke off a tiny plastic part in the sensor and it’s not connecting. Also, the engine cooling fan stays on all the time. Any ideas?
 

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Outstanding Contributor , SDS Guru
1998 MB E300TD, 1997 MB E36 AMG, 2001 MB E55 AMG
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3,972 Posts
You goofed the coolant temp sensor.

Go back and double check the coolant temp sensor.
 

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Outstanding Contributor , SDS Guru
1998 MB E300TD, 1997 MB E36 AMG, 2001 MB E55 AMG
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3,972 Posts
You goofed the coolant temp sensor.

Go back and double check the coolant temp sensor.

I'm repeating it in case you didn't get it the first time around.
 

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Registered
1982 380SEC, 2014 ML350 4Matic
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103 Posts
Discussion Starter #5
Sorry, been busy. A small plastic piece on the harness part broke when I foolishly unhooked it. Can’t seem to get it to hook on to sensor.
 

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Registered
1982 380SEC, 2014 ML350 4Matic
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103 Posts
Discussion Starter #7
Awesome, thanks. Didn’t know you could get just connector.
 

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1982 380SEC, 2014 ML350 4Matic
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103 Posts
Discussion Starter #8
Not so fast my friend..... Got a new connector from the dealer. It’s bigger than the old one and doesn’t fit on the sensor. And to replace it I had to pull the wires out of the old one, they are held really tight. New connector has much bigger holes, andI have no way to lock in wires.
 

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1982 380SEC, 2014 ML350 4Matic
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103 Posts
Discussion Starter #10
I doubt it. Looks just like the one from ECS. The problem is that my old one is a tiny bit smaller, with tiny holes for wires.
 

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Outstanding Contributor , SDS Guru
1998 MB E300TD, 1997 MB E36 AMG, 2001 MB E55 AMG
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3,972 Posts
That's the correct connector, the green thing is the weather insulation. Those are gotten separately. You can take those out with tweezers and slip them over the pins.

Also it looks like the pins were left in the original connector, did you rip out the wires from the pins?
 

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Dallas, Texas
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7,743 Posts
They have a different number on them, but same part number.
Here we go.
 

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Registered
1982 380SEC, 2014 ML350 4Matic
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103 Posts
Discussion Starter #17
That's the correct connector, the green thing is the weather insulation. Those are gotten separately. You can take those out with tweezers and slip them over the pins.

Also it looks like the pins were left in the original connector, did you rip out the wires from the pins?
By pins, do you mean the green things? I pulled wires out, didn’t know what it looked like.
 

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1982 380SEC, 2014 ML350 4Matic
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103 Posts
Discussion Starter #18
I hope someone are learning something from this. I broke the lock tab on the original connector. I wouldn’t have needed to take it off.
 

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W123 '83 200, W210 '98 E200K, W212 '13 E350
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1,842 Posts
Sit happens don't feel so bad. We all tend to sometimes rush things to get something finished no matter how hard we try to resist.

Sent from my SM-A520W using Tapatalk
 

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Outstanding Contributor , SDS Guru
1998 MB E300TD, 1997 MB E36 AMG, 2001 MB E55 AMG
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3,972 Posts
By pins, do you mean the green things? I pulled wires out, didn’t know what it looked like.
No, if you refer to witek's tutorial, you'll see the yellow wire connected to a metal pin. That pin should've been transferred over, you could've disassembled the original connector to remove the pins attached to the wire, then transferred it over to the new connector.

As it is, you have a few options. As per mrboca, you can buy a pigtail harness. Or you can buy the pins using the part number referenced by witek, then proceed as per his tutorial.
 
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