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  #1  
Old 12-23-2008, 02:33 AM
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Factory Block Heater

So after searching around and reading a bit it is my understanding that MBZDs came with a factory block heater. I think I am pretty sure i know where mine is correct me if i am wrong but it is the coolant plug that goes in on the driver's side of the block right above the injector pump. I know it goes into coolant because I have actually removed it before. The part I dont understand is it has a 12 volt connector on it how do you know whether or not the cable was installed from the factory? if it isn't couldn't you just attach a standard 120 Volt cord to it?

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  #2  
Old 12-23-2008, 03:56 AM
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You're on the wrong side of the engine. It's on the exhaust side, by cylinder number 5 IIRC. Its easiest to see from below.

-Jason
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  #3  
Old 12-23-2008, 06:49 AM
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I have one and it gets plugged for the past couple of days but I have no clue if it is actualy working whats the best way to test it ?

I didnt notice any change in temps on cold mornings car takes as long as it always did without plugging it
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  #4  
Old 12-23-2008, 08:54 AM
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They did not all come with one....my car doesn't have one....but our other three do.....it was either an option....or a dealer added accessory. Either way, the power cords seem to fall apart by the engine when they are old, and the wires short together. Inspect that wiring!
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  #5  
Old 12-23-2008, 10:12 AM
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Anybody got a picture?
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  #6  
Old 12-23-2008, 10:37 AM
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Quote:
Originally Posted by blk90s13 View Post
I have one and it gets plugged for the past couple of days but I have no clue if it is actualy working whats the best way to test it ?

I didnt notice any change in temps on cold mornings car takes as long as it always did without plugging it
You did, its not working. If the factory block heater is plugged in for more than an hour or two you be able to see the temp gauge just above the 40C mark before you start the car.
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  #7  
Old 12-23-2008, 10:55 AM
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The block heater (without cord) was standard on 1986 and newer MB diesels. All you had to do was add the cord. They would do it for free during the first year of ownership.

Prior to 1986 the block heater was a factory option.

-Jim
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  #8  
Old 12-23-2008, 11:08 AM
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Quote:
Originally Posted by blk90s13 View Post
I have one and it gets plugged for the past couple of days but I have no clue if it is actualy working whats the best way to test it ?

I didnt notice any change in temps on cold mornings car takes as long as it always did without plugging it
I know I can hear mine making a boiling sound if you listen closely to the passenger side of the motor about 10 seconds after i plug it in. My friend's 300 sounds the same. Thats how I know it is working.
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  #9  
Old 12-23-2008, 11:58 AM
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Mine too, my F250 makes the same sound.
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  #10  
Old 12-24-2008, 01:32 AM
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kool so I will listen to it tomorow morning before I leave
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  #11  
Old 12-24-2008, 10:06 AM
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Quote:
Originally Posted by tyl604 View Post
Anybody got a picture?
Yes, but it is on an OM603. If you have one there is a black plastic cover over it. I can definitely hear mine running when I plug it in. My Kill-a-watt says it draws 440KW.
Attached Thumbnails
Factory Block Heater-mercedes-block-heater-sls-015.jpg   Factory Block Heater-mercedes-block-heater-sls-001.jpg  
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  #12  
Old 12-24-2008, 07:34 PM
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I heard mine today it was sizzlling like noise the one I have on my cummins is nothing like that noise thats why I was wondering what to look for
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  #13  
Old 12-24-2008, 10:23 PM
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so if you had the heater installed how hard would it be to wire in a cord for it?
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  #14  
Old 12-24-2008, 10:31 PM
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From the pictures Bio300TDTdriver posted it looks like it would spin on and the one i found from fastlane also looks like it just plugs in


Just a matter of busting a couple of knucles
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  #15  
Old 12-24-2008, 10:50 PM
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It's a 124...

but this thread may help.

Let's Wire Up the Block Heater!

Rgds,
Chris W.

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