Wagon rear hatch door soft close mulfunctioning - Mercedes-Benz Forum
 
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post #1 of 8 (permalink) Old 06-26-2019, 07:21 PM Thread Starter
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Wagon rear hatch door soft close mulfunctioning

Hi all,

I have been rear ended several years ago and the service place did not change the lock as I have requested but instead put the old lock in (that is short version).
I have been having multiple problems through the years from door not opening and getting stuck. Last four months I have been having this particular problem. When I close the hatch door, the soft close (vacuum pump assisted I assume) locks the door and the cycles three more times trying to soft close. Sometimes, that happens when I open door as well. Sometimes, the lock locks while the door is open and then I have to unlatch it.
Here is video of how it acts like: https://1drv.ms/v/s!Av-loCVgyjOJi4t9...2vnvw?e=BTTdIC

Let me know if you have any ideas or pointing me in some direction.

Thank you
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post #2 of 8 (permalink) Old 06-27-2019, 10:06 AM
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Buddy,

It is electric, but the lock is vacuum controled-to lock and unlock-That yellow vacuum line (yellow vacuum lines are for locks to doors on all these cars).

The micro switch may be the problem in the latch assembly, or the switch mount has broken off off the latch, or worn gears on motor drive assembly too.

The gamble is to get one from the junk yard, but you will have to wait as their is no wagons in the area to get a whole latch assembly.

Martin
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post #3 of 8 (permalink) Old 06-27-2019, 02:05 PM Thread Starter
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Thanks Martin for quick reply,

It looks like it could be multiple problems. Maybe I will take out latch assembly out to see if there is mechanically broken. Have you done that and is it relatively easy to do?
I am still trying to have Cooks Collision replace the whole latch assembly as that's what they were supposed to do from the start. I will update the resolution if someone has a similar problem.

Thanks again,

BTW, do you any good indy mechanic? I need to do engine mounts on my car, got the mounts, but still collecting courage to stick my hands between frame and engine block. :-)
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post #4 of 8 (permalink) Old 06-30-2019, 05:01 PM
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Quote:
Originally Posted by karel View Post
Thanks Martin for quick reply,

It looks like it could be multiple problems. Maybe I will take out latch assembly out to see if there is mechanically broken. Have you done that and is it relatively easy to do?
I am still trying to have Cooks Collision replace the whole latch assembly as that's what they were supposed to do from the start. I will update the resolution if someone has a similar problem.

Thanks again,

BTW, do you any good indy mechanic? I need to do engine mounts on my car, got the mounts, but still collecting courage to stick my hands between frame and engine block. :-)
You are welcome,

I think you can toy with the mechanism outside of the tailgate. The yellow vacuum line can be a pain in to disconnect, and the only way practical is use the two tools on the 2nd & 3rd left from this set.. As the four-point spine can break from, just lifting one spline or two with a flat screw driver...

https://www.harborfreight.com/trim-a...-pc-64126.html

Your motor mounts...

I would roll the car on some plastic ramps for the front tires.

Set your parking brake, and block your rear tires.

On the M112 engine is only one bolt on the bottom through the subframe, but remove the top nut on each first... Then you can put a thick ply plate on the oil pan, or a few cut 2x4's and lift with a floor jack.

Attach the mounts from the top..

Lower the engine slowly, yet you may have to use some 3ft pieces of(I use wooden baseball bats) 2x4 to shift the engine left to right a bit to align the bolt hole on the subframe. Add some thread locker to the bolt for each mount...

Do the transmission mount too.

Whatever you do do not buy URO mounts..

Buy Mercedes if you can afford it, but you can mail-order those these days.

Out of Florida,

https://www.mercedespartshub.com/

Southern California,

https://www.mercedespartsdepot.com/

Or get Lemforder. I'd even try Rein from Autohaus in Arizona

https://www.autohausaz.com/mercedes-...rts/index.html

I do not know any shops here in Sacramento as I do all my work to my fleet of Benz cars...

I had to disconnect upper and lower radiator hoses at the radiator. Drain it on a clean bucket to re-use the coolant.

Our famous G-AMG buddy(my Buddy writes nice how too's-He has a pile of them for these cars). Here is the Motor mount one, and tranny one...

https://www.benzworld.org/forums/w21...lacements.html

https://www.benzworld.org/forums/w14...ion-mount.html

All the best,

Martin

Last edited by MAVA; 06-30-2019 at 05:14 PM.
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post #5 of 8 (permalink) Old 07-02-2019, 07:46 PM Thread Starter
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Thank for the reply,
I am going to see the Cooks Collision tomorrow so I will see what they have to say. If the are pain, I will take out the latch assembly and will try to poke around.

I already got the Lamforder mounts and the tranny mount. Maybe I will try to do it on Thursday after 4th of July parade. Did you do yours one at a time or both at the same time (e.g. removed one mount at a time and install new one or removed both together and then installed two new ones at the same time?) It seems that it is better to do one at a time to keep the alignment of bolts. I got myself the extension for the engine blocks removal (the little tool with the hex for the bolt and square for ratchet extension, so I hope that it will make the job easier.


I will let you know how it went.


Karel
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post #6 of 8 (permalink) Old 07-02-2019, 10:14 PM
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You are welcome,

Pick N Pull in Rancho Cordova regular yard they put a Silver E320 RWD wagon, and the hatch works. It may be worth your wild to go on 5th - 7th as everything is half-off normal price. Just sign-up for their rewards card..

https://www.picknpull.com/toolkit_rewards.aspx

https://www.picknpull.com/events_and...Detail&ID=3648

https://row52.com/Vehicle/Index/WDBJH65J41B284030

https://row52.com/Search/?YMMorVin=Y...se&Distance=25

Hope it helps,

Martin
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post #7 of 8 (permalink) Old 07-02-2019, 10:27 PM Thread Starter
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You rock!!! I hope I can put my car together on 4th of July so I can drive down there, ;-) I will for sure check it out.

Thanks again,

Karel
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post #8 of 8 (permalink) Old 07-03-2019, 08:11 AM
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No, this forum "Rocks". It is the people that hang out that make it great... Thank you..

Bring your own tools, and grungy clothes along with shoes. Bring some Ice cold water. I drank a 1/2 gallon never went to the bathroom yesterday. It is hot now. Put sunscreen, and bring you "Sombrero"(hat) not a cap... It is like 10 to 15 degrees hotter with all those cars 3ft apart, so it is a pressure cooker there... That is alot of sheet-metal

Martin
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