DIY : R171 Trunk Struts Replacement - Mercedes Benz SLK Forum

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#1 Old 01-16-2011
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DIY : R171 Trunk Struts Replacement

Hi,

Today I Replaced the R171 Trunk Struts.

Part Number: A171 750 00 36

This is the DIY:

1. Remove the opening limiter:










2. Secure the hinges on both sides so the trunk doesn't close on you:






3. Remove the struts:






4. Grease the ball joints:





5. Install the new Struts.

Last edited by Caboz; 01-17-2011 at 08:14 PM.
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#2 Old 01-16-2011
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Very helpfull information...I just change mine yesterday.
The black piece i just remove the square top without removing it from the arm.
..after 1 hour trying to figure it out !!!
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#3 Old 01-16-2011
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Thanks for posting. The SLKStore.com has OEM Mercedes-Benz trunk struts if anyone needs these.

http://www.slkstore.com/home.php?cat=295
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#4 Old 01-17-2011
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Moderators, may I ask that this be made "sticky".

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#5 Old 01-17-2011
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Is this job on the 171 that different than the job on the 170? I replaced the struts on my 170 and there was no need for wire ties or removing the opening limiter. Just pop the old strut off and put the new one in. Took about five minutes.

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#6 Old 01-17-2011
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Better to edit this and replace "disassemble" with "remove." Two times.

You don't take apart the bumpers and you don't take apart the shocks, you just remove/install them.
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#7 Old 01-17-2011
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Ok, done!

Quote:
Originally Posted by lkchris View Post
Better to edit this and replace "disassemble" with "remove." Two times.

You don't take apart the bumpers and you don't take apart the shocks, you just remove/install them.
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#8 Old 01-17-2011
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Quote:
Originally Posted by sokoloff View Post
Is this job on the 171 that different than the job on the 170? I replaced the struts on my 170 and there was no need for wire ties or removing the opening limiter. Just pop the old strut off and put the new one in. Took about five minutes.
On the R171 we have only two options; compress the struts (very difficult and easy to damage the struts) or like I described.

Because if you don't remove the opening limiter there isn't enough distance between the ball joints to install the new strut.
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#9 Old 01-17-2011
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Quote:
Originally Posted by Caboz View Post
On the R171 we have only two options; compress the struts (very difficult and easy to damage the struts) or like I described.

Because if you don't remove the opening limiter there isn't enough distance between the ball joints to install the new strut.
And, gee, it's how Mercedes specifies it be done.

And FWIW you can do one side at a time.
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#10 Old 01-18-2011
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Yes I recommend doing it one side at a time, but always secure the hinges or have someone hold the trunk for you, this all procedure takes no more than 10 min.
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#11 Old 01-18-2011
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Quote:
Originally Posted by Caboz View Post
Yes I recommend doing it one side at a time, but always secure the hinges or have someone hold the trunk for you, this all procedure takes no more than 10 min.
IIRC, without removing the plastic triangular base with the rubber "stopper", the rubber bumper can be slid sideways from its trapezoidal base.

I like the idea of using plastic ties to partially secure the hinges and someone lifting up the trunk lid Thanks for the DIY.
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#12 Old 01-18-2011
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Thanks for taking the time to photograph and share. I also like your idea with the plastic ties. Great safety tip!
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#13 Old 02-26-2011
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Talking

Thanks ...just did mine...great DIY...
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#14 Old 03-11-2011
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Thank you very much, I am about to do this job and this description has been very helpful. Thank You
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#15 Old 03-21-2011
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My pleasure!

I noticed a big difference on lifting the trunk, almost didn't remember how easy it was wen it was new.
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#16 Old 04-13-2011
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Strut replacement using a clamp

Thanks Caboz for the great instructions. Of course I found them after replacing mine. Here is an alternative solution, but Caboz has the best one. Wish I knew about removing the trunk limiters.

Prop open the trunk and slide back the spring clips from the struts. Brace the trunk open. After attaching the lower end of the strut, I used a 12 inch "quick clamp" to compress each strut about !/2 inch and snapped it into position. Replace spring clip. Thats all it took. Note clamp needs to be on the very end of the strut.
Attached Images
File Type: jpg Trunk Support.jpg (50.1 KB, 92 views)
File Type: jpg Trunk Clamp.jpg (51.6 KB, 99 views)

Last edited by Philly Bob; 06-05-2011 at 05:54 PM.
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#17 Old 04-13-2011
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im guessing this would prevent the trunk lid from coming back down and hitting me on the head as I rummage in the boot.
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#18 Old 04-14-2011
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Moderators, may I ask that this be made "sticky".
I second the motion.........
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#19 Old 04-22-2011
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Was pointed to this article by another member and really appreciate it being posted! Just wanted to point out that it may not be immediately evident how to remove the limiter clips -- I found it wasn't sufficient to just slide the rubber bit out. I had to gently wedge two screwdrivers (one under each side) to get the tabs to disengage from the slot in the hinge arm.

Other than having to find a way not to damage the clips while removing them, this was pretty easy!

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#20 Old 04-22-2011
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Quote:
Originally Posted by taroliw View Post
Was pointed to this article by another member and really appreciate it being posted! Just wanted to point out that it may not be immediately evident how to remove the limiter clips -- I found it wasn't sufficient to just slide the rubber bit out. I had to gently wedge two screwdrivers (one under each side) to get the tabs to disengage from the slot in the hinge arm.

Other than having to find a way not to damage the clips while removing them, this was pretty easy!

Welcome back taroliw.

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