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Old 07-21-2008, 03:52 PM   #1 (permalink)
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Date registered: Oct 2005
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Trunk Close Assist

Ever since, I thought the trunk handle pulling in WAS the trunk assist. Not until I saw another close assist at work did I realize mine wasnt working at all

another point to note, when my door close assist runs, my trunk latch pulls in regardless if the trunk is open or closed


As I found out , my trunk latch is pulled by the door close assist pump. I snapped a quick pic of the pump

the left most tube leads to the trunk.

today, I peaked under my trunk lid and I didnt see any other vacuum tube. so the tube from the door assist is the only one leading to the trunk lid

I will schedule to take off my trunk lid lining completely and figure out what triggers the latch to pull


anyone who can pitch in, please do so. thank you
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Last edited by z168 : 07-21-2008 at 03:56 PM.
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Old 07-21-2008, 04:16 PM   #2 (permalink)
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Look again, the left most tube is just a vent and goes in the left corner next to the light housing and terminates there. The trunk should be on HD connector.
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Old 07-21-2008, 04:37 PM   #3 (permalink)
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Originally Posted by myarmar View Post
Look again, the left most tube is just a vent and goes in the left corner next to the light housing and terminates there. The trunk should be on HD connector.
since I pulled it the latch has stopped pulling in. Ive followed the line and it does lead to the trunk latch

I have a '93 300SE btw
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Old 07-21-2008, 04:41 PM   #4 (permalink)
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What is on HD?
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Old 07-21-2008, 04:49 PM   #5 (permalink)
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What is on HD?

good question - that one I dont know. it goes together with the other 4 lines

let me take a look at it again. I will be back
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Old 07-22-2008, 12:46 AM   #6 (permalink)
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Interesting.... I also thought mine wasnt working until i looked up the option codes and realised that it didnt have the option. AFTER i searched with all my eyes for the lines leading to the boot (which are there by the way) they just seem to be sealed off near the tail lights. I might have a second look.

And while we are on the subject, can anyone tell me why my master key wont open the boot (trunk) if the battery is dead?!
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Old 07-22-2008, 10:25 AM   #7 (permalink)
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good question - that one I dont know. it goes together with the other 4 lines

let me take a look at it again. I will be back
myarmar is spot on. Looks like the HD and SK lines are the only ones not labelled in your picture. Perhaps these got switched by someone. Swap 'em and see what happens.

Brett
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Old 07-22-2008, 02:46 PM   #8 (permalink)
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myarmar is spot on. Looks like the HD and SK lines are the only ones not labelled in your picture. Perhaps these got switched by someone. Swap 'em and see what happens.

Brett
Ive thought about doing that. but it meant I had to pull the SK line about an inch or less to reach the HD line.

I thought maybe it was switched. but when I pulled all the panels to get to the pump it seemed like it hasnt been touched since new so I knew I was the first one to it

but ok, I will try to swap em out tonight and I will report what happens
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Old 07-23-2008, 03:41 PM   #9 (permalink)
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Oh yeah! I swapped and lines and pulled fuse 3 & 9 and voila - now works for the first time. Thanks Myarmar & Brett

I did notice the trunk has to slam shut before it pulls the trunk

unlike how the doors get pulled in if theyre halfway closed, the trunk has to lock before it pulls it in (which technically defeats the "assist") - is this how its supposed to work?

Last edited by z168 : 07-23-2008 at 03:57 PM.
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Old 07-23-2008, 09:29 PM   #10 (permalink)
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Oh yeah! I swapped and lines and pulled fuse 3 & 9 and voila - now works for the first time. Thanks Myarmar & Brett

I did notice the trunk has to slam shut before it pulls the trunk

unlike how the doors get pulled in if theyre halfway closed, the trunk has to lock before it pulls it in (which technically defeats the "assist") - is this how its supposed to work?
No, either the trunk latch in the body is loose or it is tight but adjusted too low. There are two plastic covers on either side of the latch (you don't have to remove anything but the little covers). They cover up two 10 mm bolts which mount the latch. Loosen them and slide the latch to the appropriate location and re-tighten.

Or... your striker eye in the trunk lid is not releasing properly to ready it for closing by the closing assist pump. When you open the trunk, does it pop out about 1/2 inch? It should. On my car, the PSE pump is responsible for releasing the striker eye.

Brett

Last edited by Brett San Diego : 07-23-2008 at 09:39 PM.
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