Radiator Drain Plug can be spun, not feeling locking, is it ok to leave in Horistonal
Thread Starter
Junior Member
Joined: Oct 2023
Posts: 61
Likes: 20
E63 Wagon
Radiator Drain Plug can be spun, not feeling locking, is it ok to leave in Horistonal
I was changing the water pump and drained the radiator, via plug on the bottom side, on my 2014 E350 Wagon.
While trying to drain faster, I thought the piug has to be turned out.. and maybe I was wrong there?
Internet suggested it is simply a petcock, you turn 90 degrees.
Now that I tried to close out, it can be rotated, over and over again, it does not look, and it does not come out.
Internet suggests it is only held by the seal- friction now? That tabs may have broken.
Has any body had this occur, or knows if simply leaving the drain plug in horizontal position will seal safely?
I am concerned to warm up the car, and have it lunched out by the cooling system pressure.
Thank you.
While trying to drain faster, I thought the piug has to be turned out.. and maybe I was wrong there?
Internet suggested it is simply a petcock, you turn 90 degrees.
Now that I tried to close out, it can be rotated, over and over again, it does not look, and it does not come out.
Internet suggests it is only held by the seal- friction now? That tabs may have broken.
Has any body had this occur, or knows if simply leaving the drain plug in horizontal position will seal safely?
I am concerned to warm up the car, and have it lunched out by the cooling system pressure.
Thank you.
Thread Starter
Junior Member
Joined: Oct 2023
Posts: 61
Likes: 20
E63 Wagon
I bought new drain plug for $9 from MBZ local dealer, will insert it now.
https://www.fcpeuro.com/products/mer...xoCvhoQAvD_BwE
Only mystery is how to insert:I believe in OPEN position, while the tabs lock in COSED position.
I'll pull with pliers in OPEN position to see if it slides out easily.
https://www.fcpeuro.com/products/mer...xoCvhoQAvD_BwE
Only mystery is how to insert:I believe in OPEN position, while the tabs lock in COSED position.
I'll pull with pliers in OPEN position to see if it slides out easily.
Thread Starter
Junior Member
Joined: Oct 2023
Posts: 61
Likes: 20
E63 Wagon
Worked, installation is a little unusual, it's at an angle a bit, you push gently with greased seal, and rotate until it suddenly kind of slides in and as you turn it locks/stops.
That is it. It's locked in pretty much near Vertical Line/Knob direction, a bit off center.
That is it. It's locked in pretty much near Vertical Line/Knob direction, a bit off center.
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Joined: Oct 2010
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From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
Worked, installation is a little unusual, it's at an angle a bit, you push gently with greased seal, and rotate until it suddenly kind of slides in and as you turn it locks/stops.
That is it. It's locked in pretty much near Vertical Line/Knob direction, a bit off center.
That is it. It's locked in pretty much near Vertical Line/Knob direction, a bit off center.
When turning you must not force the turn after the 90 degrees as you would break the tabs.
