Trunk won't lock? - Mercedes Benz SLK Forum

SLK R172 General Discussion Discussion regarding the Mercedes SLK R172

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#1 Old 08-16-2016
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Trunk won't lock?

Well, I just picked up my new (to me) 2012 slk55 and I've got a question that the non-MB dealer can't answer (and is waiting for a callback from MB):

the trunk won't lock.

Car locks with fob (both doors), lights flash, etc but the trunk can still be opened by hand.

Nothing I can do seems to be able to get the trunk lock coordinated with the door locks.

I'm thinking the previous owner had changed "something". The only thing I can come up with (google is no help) after reading the manual is to do a factory reset on both fobs.

Is this the only solution or what am I doing wrong?
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#2 Old 08-16-2016
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Can it be locked from the dash button?


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#3 Old 08-16-2016
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Dash button? Not if I can't find it. Can't find a button reference in the manual nor if I actually look on the dash. I'm so embarrassed
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#4 Old 08-16-2016
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http://www.mbusa.com/vcm/MB/DigitalA...-SLK-Class.pdf

page 75?

for r172, not on dash, on door. for r171 and r170, it was on dash


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#5 Old 08-16-2016
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roof closes ok?
trunk partition closed properly?

have you eyeballed the trunk latch to make sure it is not 'locked' open?


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#6 Old 08-16-2016
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Quote:
Originally Posted by jbanks15 View Post
http://www.mbusa.com/vcm/MB/DigitalA...-SLK-Class.pdf

page 75?

for r172, not on dash, on door. for r171 and r170, it was on dash
Nope. Works the doors. Trunk is still unlocked.
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#7 Old 08-16-2016
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see my post above your reply in case you missed it with some other questions


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#8 Old 08-16-2016
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you can try a battery reset for giggles

usually clears up issues


disconnect your car battery negative cable for a minimum of 30 minutes
reconnect cable
reset clock and synch your windows

lock car and try trunk


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#9 Old 08-16-2016
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Quote:
Originally Posted by jbanks15 View Post
roof closes ok?
trunk partition closed properly?

have you eyeballed the trunk latch to make sure it is not 'locked' open?
Roof is ok.
Trunk partition is ok (roof works ok; woulldn't if the shelf or lid were "off").

It doesn't "pop open" . I have to work the latch to get it open.

Woulld it be because I've got the key fob in my pocket?

I'll try without the fob and see what happens.
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do you have the manual key/valet key in your key fob?
if so, try it in the trunk lock
it might be 'locked' open


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#11 Old 08-16-2016
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That was it. Even though the doors were locked, having the fob in my pocket allowed the trunk to open. I left the fob in the house and tried to open the trunk. Now it won't open.



Thanks for helping me get my brain in gear.
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#12 Old 08-16-2016
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You did it all by yourself!

Now read your thread on editing and get your free gift!


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