SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

SL/R230: 03sl trunk stuck

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Old Jun 20, 2018 | 04:26 PM
  #1  
wardhill's Avatar
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From: Maine
2003 sl500
03sl trunk stuck

Hi folks, after running low on hydraulic fluid my roof no longer operates and is stuck in a partially closed position I cannot open the trunk to access the pump and had fluid does anyone have any suggestions please help thank you Jeff
We are trying partially opened on the bow
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Old Jun 20, 2018 | 04:49 PM
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2005 SL500 Designo Edition
I know that I am a newbie here but can you not use the key and manually open it like you would do for maintenance?
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Old Jun 20, 2018 | 06:22 PM
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No when its not fully retracked the hinge to trunk doesnt work
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Old Jun 20, 2018 | 08:23 PM
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After the car has set for awhile, the pressure in the system should have bled off an you should be able to push down on the trunk to close it. At that point you can open the trunk normally. Fill the pump and then return the roof to the up position. Lastly find and repair the leak in the system.
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Old Jun 20, 2018 | 08:30 PM
  #5  
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From: Bremerton, WA
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White Spyder beat me to the punch, but that was going to be my next ask/suggestion as well.
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Old Jun 20, 2018 | 09:10 PM
  #6  
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2003 CL 600
Originally Posted by wardhill
No when its not fully retracked the hinge to trunk doesnt work
Not true, use the key blade in the trunk latch and it will open anyway. There's a service position where the frame is fully open and the lid is open, you first tilt the trunk up then unlock the lid, or you can do it the other way. Both are mechanically unlockable.

If you can get the trunk to open up, you can use the allen to lock the latches down fully and then close the trunk, until you repair the system it will seal fine like that.
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Old Jun 20, 2018 | 09:11 PM
  #7  
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Originally Posted by White Spyder
After the car has set for awhile, the pressure in the system should have bled off an you should be able to push down on the trunk to close it. At that point you can open the trunk normally. Fill the pump and then return the roof to the up position. Lastly find and repair the leak in the system.
Just pushing down isn't enough to engage those locks, they move through almost 90 degrees and have a lot of leverage, the force you would have to apply just pushing down on the trunk would likely damage the trunk before it latched down. With the trunk open you can get to them though.
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Old Jun 20, 2018 | 09:18 PM
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Thanks ItalianJoe1 that is what I was trying to explain earlier.
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Old Jun 21, 2018 | 08:31 AM
  #9  
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So that worthless key has som purpose
ill give it a try. If im so lucky to get to that point what type of hydrolic fluid do i need to buy
thanks everyone for your help i didnt want to flat bed the car to the dealer 1 hour away
jeff
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Old Jun 21, 2018 | 12:07 PM
  #10  
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From: Bremerton, WA
2005 SL500 Designo Edition
Based on what I read, I used the same Pentosin CHF11S that is for the ABC system, so far no issues. RockAuto has the best price @ $12.59/QT that I have been able to find. That is about half of what my local autoparts place wants. I purchased 12, it is was $11.99 for ground shipping, since I was not in a hurry I went that route.
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Old Jun 21, 2018 | 01:58 PM
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You can use pentosin for the fluid, however it smells really bad and will mess up your headliner when it leaks onto it, ask me how i know . I tried for weeks to get the smell out but the oil had seeped deep into my alcantara fabric.
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Old Jun 21, 2018 | 03:59 PM
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From: Kirkland, WA
2003 SL500
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Originally Posted by wardhill
So that worthless key has som purpose
ill give it a try. If im so lucky to get to that point what type of hydrolic fluid do i need to buy
thanks everyone for your help i didnt want to flat bed the car to the dealer 1 hour away
jeff
When you consumer battery runs low one day, you'll quickly realize how valuable this "worthless" key is. Ask me how I know.
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Old Jun 21, 2018 | 06:23 PM
  #13  
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From: Bremerton, WA
2005 SL500 Designo Edition
Talking

Originally Posted by FxFormat
You can use pentosin for the fluid, however it smells really bad and will mess up your headliner when it leaks onto it, ask me how i know . I tried for weeks to get the smell out but the oil had seeped deep into my alcantara fabric.
What did you use as an alternative?
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Old Jun 21, 2018 | 10:35 PM
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This is the proper fluid:

http://bevo.mercedes-benz.com/bevolisten/343.0_en.html
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