Trunk and Door Locks Stopped Functioning

Bartlett · 12-01-2010, 11:59 PM

I recently had to remove my battery to recharge it on my 2003 S500 as my wife accidently left the driver side door open all night. Upon placing the charged battery back in the car the trunk lock would not release nor would the extending handle retract whether I use the trunk lid release switch in the car or my smartkey remote. In order to open the trunk, I have to use the mechanical key but the extending handle remains extended and still does not retract. Additionally, the door locks do not function, neither remotely nor by pressing the central lock/unlock switch in the car. The back seat headrests also are not operating. I tried disonnecting the battery overnight and then reconnecting it and still the problem persists. I checked the fuses and they appear OK. These items were functional prior to the battery being removed and all of a sudden they don't work. Can anyone assist me with this? I'd truly appreciate it.

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xexpo · 12-03-2010, 10:09 PM

Did you check the f62 20amp yellow fuse under the rear right passenger side fuse box?

Bartlett · 12-12-2010, 07:18 PM

Yes, I did and did check others just in case but all seemed OK. Everytime that I close the door I can hear the pump (PSE?) in the trunk but nothing happens. I'm still looking.
Thanks,
Bartlett

fc46395 · 01-12-2011, 02:35 PM

Hi Bartlett, did you ever find out what happened or the issue was for you doors not unlocking and hood latch staying open?

Thank you,
Steve

fc46395 · 01-12-2011, 05:27 PM

I've located the pump. I here the pump running each time i try to lock unlock. but nothing happens. I find it odd that it stopped working after leaving the door and trunk open for a long time, like Bartlett experienced.

shaw01 · 01-13-2011, 03:46 PM

if the fuse is fine and the pump is working (don't assume on this one) .. then you've got blocked or leaking hoses.

had the issue myself, fuse at first but kept going, eventually had to replace the pump.

be happy you got stuck in the "unlocked" position .. when you're stuck in locked the gas cap is also locked shut. the things i had to do to my car to open it make me shudder .. involved a screwdriver and old t-shirt

(happened while driving back from vegas)

best of luck.

la22bay · 01-13-2011, 08:24 PM

Quote:

Originally Posted by Bartlett

I recently had to remove my battery to recharge it on my 2003 S500 as my wife accidently left the driver side door open all night. Upon placing the charged battery back in the car the trunk lock would not release nor would the extending handle retract whether I use the trunk lid release switch in the car or my smartkey remote. In order to open the trunk, I have to use the mechanical key but the extending handle remains extended and still does not retract. Additionally, the door locks do not function, neither remotely nor by pressing the central lock/unlock switch in the car. The back seat headrests also are not operating. I tried disonnecting the battery overnight and then reconnecting it and still the problem persists. I checked the fuses and they appear OK. These items were functional prior to the battery being removed and all of a sudden they don't work. Can anyone assist me with this? I'd truly appreciate it.

you will have to reprogram key and locks just call 1800formercedes they will walk you thru

01-12-2011, 02:35 PM	#4
fc46395 Newbie Garage is empty, add now Join Date: Jan 2011 Posts: 2 Drives: 2003 mercedes s430	Bartlett, exact same scenario happened to me this weekend Hi Bartlett, did you ever find out what happened or the issue was for you doors not unlocking and hood latch staying open? Thank you, Steve

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12-03-2010, 10:09 PM	#2
xexpo Member Garage is empty, add now Join Date: Dec 2008 Location: VA USA Posts: 148 Drives: 2000 S430 140k (07/11)	Did you check the f62 20amp yellow fuse under the rear right passenger side fuse box?

12-12-2010, 07:18 PM	#3
Bartlett Newbie Garage is empty, add now Join Date: Nov 2010 Posts: 4 Drives: S500	Yes, I did and did check others just in case but all seemed OK. Everytime that I close the door I can hear the pump (PSE?) in the trunk but nothing happens. I'm still looking. Thanks, Bartlett

01-12-2011, 05:27 PM	#5
fc46395 Newbie Garage is empty, add now Join Date: Jan 2011 Posts: 2 Drives: 2003 mercedes s430	I've located the pump. I here the pump running each time i try to lock unlock. but nothing happens. I find it odd that it stopped working after leaving the door and trunk open for a long time, like Bartlett experienced.

01-13-2011, 03:46 PM	#6
shaw01 Senior Member Garage is empty, add now Join Date: Sep 2005 Posts: 310 Drives: 2001 S500 Sport Package	if the fuse is fine and the pump is working (don't assume on this one) .. then you've got blocked or leaking hoses. had the issue myself, fuse at first but kept going, eventually had to replace the pump. be happy you got stuck in the "unlocked" position .. when you're stuck in locked the gas cap is also locked shut. the things i had to do to my car to open it make me shudder .. involved a screwdriver and old t-shirt (happened while driving back from vegas) best of luck.

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01-13-2011, 08:24 PM