R-Class (W251) Produced 2006-2013: R320CDI, R350, R420CDI, R500

Trunk Latch Doesn't Release

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Old 07-29-2013, 01:10 AM
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ML500, R500
Trunk Latch Doesn't Release

Rather that hijack another thread, I opted to post a new one since my issue is a little different. My wife's 2006 R500's rear trunk latch doesn't release. It was intermittent, but now flat out refuses. The motor works fine to open and close the door and I can head the buzz go when it tries to unlock the door, but it just remains stuck.

Any ideas how to fix it? Thanks
Old 07-29-2013, 10:59 AM
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2007 R320 4matic / Airmatic
Have you tried the inside manual release?
Old 07-29-2013, 12:13 PM
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Yes, the manual release does work.
Old 08-10-2013, 06:16 PM
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2008 R350 4-matic
It's a $650 repair at the dealership unless you have warranty. I had mine replaced like every other R class owner, it seems.
Old 10-21-2013, 10:56 AM
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My wife's 2006 R500 (115K miles) has the same issue. Trunk won't release. I can get it to release manually from inside and it will then raise and when needed lower and lock. Just won't release with power. I can hear it trying to...ugh. I read an earlier thread that intimated it was a battery issue. Car does seem slow to start at times....so which is it?
Old 10-22-2013, 11:28 AM
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2007 R320 4matic / Airmatic
Originally Posted by gragsdale64
My wife's 2006 R500 (115K miles) has the same issue. Trunk won't release. I can get it to release manually from inside and it will then raise and when needed lower and lock. Just won't release with power. I can hear it trying to...ugh. I read an earlier thread that intimated it was a battery issue. Car does seem slow to start at times....so which is it?
If your car still has its original battery, you are on borrowed time. I would never leave a battery in my car for more than 4 years.
Old 10-22-2013, 12:31 PM
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2006 MB R500
R500 Latch

Originally Posted by PeteInLongBeach
If your car still has its original battery, you are on borrowed time. I would never leave a battery in my car for more than 4 years.
Pete, battery is not original. Replaced a few years back. I do notice that it seems to be a little slow at starting lately. May take it to my indy guy for a look see. Wife is getting REALLY frustrated with car as of late....one thing after another..

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