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1992 Mercedes Benz 190E 2.3L-8V
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215 Posts
Discussion Starter · #1 ·
It seems to me I have some of the most interesting problems here...

Basically, I drive my car over my 2 hour lunch break, everything works fine, driver door locks as intended. Central locking isn't working quite right... After school, I go to work, door locks work fine. I come out of work 5-ish hours later, doors unlock fine, but when I get into the car and close the door, it rebounds back open a few inches. By closing and holding the door in the 'closed' position, the door latch engaged fully, and the door was closed. I also noticed that the inside door latch would stay stuck open, as if there was ice on the innards of the door. The metal door handle was also frosty, I believe.

But, I get home, and with all the wonderful things my dad has engrained into me, I HAVE to have the door locked.

The door wouldn't lock with the key, so, without thinking, I opened the back door, unlocked and opened that, closed and then locked the front door through the back door, and then locked and closed the back door, without even thinking about trying to UNLOCK the car before I did so.

Driver door doesn't unlock. Key goes in, turns with no resistance, and doesn't do anything. My guess is something is frozen slightly off where it needs to be, not allowing the lock cylinder to engage properly and unlock.

Anyways, I need a way to unlock my door, and the lock situation is as follows:
Driver door lock is not an option with the key. Spins, doesn't do anything.

Front passenger door lock is not an option. Key doesn't go in at all, lock is damaged... I'm guessing someone swapped the lock cylinders in the front after the driver's side got damaged to the point where the key can't go in?

The trunk, however, does unlock.
BUT.
Central locking isn't working right.
So, my central locking situation: Driver door lock doesn't do anything to the central locking. Trunk lock doesn't do anything to the central locking.
However, I'm pretty sure that all the locks do get changed by the passenger side lock.
So, I need a way to unlock my car. Would a vacuum pump on the trunk line to the central locking pump be enough to engage the lock and unlock one of the inside doors? Or perhaps putting a known working actuator on the trunk lock mechanism?

Up for any ideas. I'd love to not have to tow it, or get ticketed for parking in the street when they plow after the next snow.
 

· Registered
1992 Mercedes Benz 190E 2.3L-8V
Joined
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215 Posts
Discussion Starter · #3 · (Edited)
The front passenger door will lock and unlock all the doors when you lock/unlock that door. The front driver door will not lock and unlock the doors, nor will the trunk.

And. How am I supposed to get into the hood without first getting inside the cabin to grab the engine release?


This does give me another idea, though.

If there is a way to get into the engine compartment without getting inside the cabin, are there any ports you can jump on the x11 plug to jump the vacuum pump inside the car? I.E., open the hood, jump the plugs to run the vacuum pump and unlock the doors?
 

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92 190e 2.6 Sportline, 2005 clk55
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1,200 Posts
I would check and see if the vac line is connected to the trunk lock. if it is discon then try hooking it back up and turning the key. otherwise I think a slim jim onthe pas door is the next step.
 

· Registered
1992 Mercedes Benz 190E 2.3L-8V
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215 Posts
Discussion Starter · #5 ·
It is possible to unlock with a slimjim, then? Any tips/pointers on unlocking it are welcome.

Rear passenger door has the exterior window trim coming off. Would this be an easier place to start?
 

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1987 190D Turbo
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1,290 Posts
I'm confused, but that's the usual situation. The vacuum pump for the locks is located under the rear seat, the aside from power, nothing runs through the engine compartment. Everything happens under the right side of the rear seat. It sounds like your trunk actuator isn't working properly, it should switch the pump on. I would remove it and try to get the pump working by jumping the leads to the switch. If you can get that to work, you just need a new trunk actuator.

Good luck trying to get a Mercedes open with a slimjim. If you call a locksmith, the way they do it is to use plastic wedges to crack the door a bit, and grab the knob with a wire.

And don't even try to open the hood if you don't have access to the passenger compartment. It's not as easy as it looks.
 

· Registered
1992 Mercedes Benz 190E 2.3L-8V
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215 Posts
Discussion Starter · #7 ·
Crisis averted.
My dad noticed that an "L" shaped metal piece was in the way on the passenger side. Moving that out of the way with an o-ring, he got the key in and unlocked the doors.

Still fairly certain something on the inside of the driver door is broken. But, that's a project for when it's warm.
 

· Registered
81 500SEL, 84 300TDT, 86 + 87 190E 2.3, 91 + 92 300D 2.5T, 95 E320 Wagon, 09 C300 4MATIC
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1,766 Posts
My central locking linkage on the trunk is broken. If I unlock the trunk, it's got the vacuum actuator that I can pull in one direction or the other to unlock or lock the whole car.
 
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