Trunk Will Not Stay Up
08-21-2013, 02:11 AM
#1
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Thread Starter
Trunk Will Not Stay Up
I have searched both this forum and benzworld and can't seem to find any responses. I have seen a couple of threads but they are several years old.
Here is my problem. The trunk opens fine with the key, button on the trunk, and the button on the door. However, once it is all the way open after about 5 minutes or so it will slowly drift back down. You really have to keep your eye on it so that you don't get bopped in the head.
I have check the pump near the battery and put enough ATF in it to the fill line. However this did not resolve the problem.
Anyone else experiencing this problem? All of my soft close features work just fine. 2003 S500.
Here is my problem. The trunk opens fine with the key, button on the trunk, and the button on the door. However, once it is all the way open after about 5 minutes or so it will slowly drift back down. You really have to keep your eye on it so that you don't get bopped in the head.
I have check the pump near the battery and put enough ATF in it to the fill line. However this did not resolve the problem.
Anyone else experiencing this problem? All of my soft close features work just fine. 2003 S500.
08-24-2013, 12:07 AM
#2
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Join Date: Sep 2012
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2009 E350 4M Avantgarde;mistress 2002 S600; wife 2014 C300 4M
I have searched both this forum and benzworld and can't seem to find any responses. I have seen a couple of threads but they are several years old.
Here is my problem. The trunk opens fine with the key, button on the trunk, and the button on the door. However, once it is all the way open after about 5 minutes or so it will slowly drift back down. You really have to keep your eye on it so that you don't get bopped in the head.
I have check the pump near the battery and put enough ATF in it to the fill line. However this did not resolve the problem.
Anyone else experiencing this problem? All of my soft close features work just fine. 2003 S500.
Here is my problem. The trunk opens fine with the key, button on the trunk, and the button on the door. However, once it is all the way open after about 5 minutes or so it will slowly drift back down. You really have to keep your eye on it so that you don't get bopped in the head.
I have check the pump near the battery and put enough ATF in it to the fill line. However this did not resolve the problem.
Anyone else experiencing this problem? All of my soft close features work just fine. 2003 S500.
1) the actuator is leaking internally passed the piston seal, or
2) the selector valve or run-around valve (both internal to the pump body) are leaking.
Before anything else: are the gas springs ok?
]
08-24-2013, 03:28 PM
#3
MBWorld Fanatic!
Thread Starter
My next step was to replace the trunk struts. I don't know how difficult or easy they are to replace. But I can probably purchase both struts for around $100.
05-08-2014, 08:41 AM
#4
Senior Member
Trunk dirfts closed, but only on a hill.
If you have refilled the hydraulic fluid in the reservoir, there is only two places to cause this trouble:
1) the actuator is leaking internally passed the piston seal, or
2) the selector valve or run-around valve (both internal to the pump body) are leaking.
Before anything else: are the gas springs ok?
]
1) the actuator is leaking internally passed the piston seal, or
2) the selector valve or run-around valve (both internal to the pump body) are leaking.
Before anything else: are the gas springs ok?
]
Again, it works fine on level ground, only happens on a grade.
05-13-2014, 10:01 PM
#6
Junior Member
I had the same problem on my S65, and after I replace the two trunk struts, it solved the problem.
Last edited by gregwang168; 05-13-2014 at 10:04 PM.
07-10-2014, 08:05 PM
#7
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W220 S430
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07-11-2014, 09:38 AM
#8
Simple pop off and pop on. Google "Mercedes S500 trunk strut" Avoid the Ebay listings for $20 each, they ship from China and probably wont last very long. Here is an example of a reputable vendor...
http://www.partsgeek.com/catalog/200...ml?brand=suspa
Yes, a bit pricey, but the OEM struts from the dealer are $170'ish.
http://www.partsgeek.com/catalog/200...ml?brand=suspa
Yes, a bit pricey, but the OEM struts from the dealer are $170'ish.
07-13-2014, 09:26 PM
#9
I had similar issues with my car. I took the gamble & bought a new pair for my trunk and front hood off ebay from a HongKong supplier for $29 each. The trunk struts had the original Mercedes logo and part# sticker saying Made in Germany and they work great. The front hood was after market brand CNBA and one of them started leaking air and bubbling immediately after I installed them...10 minutes later hood was falling back down. Fortunately I emailed the seller and he issued me a full refund. I then bought another pair off a different seller so in the end it worked out and I'm satisfied. You can still find genuine MB struts on ebay if you want to go that route also. YMMV.
