Purchased this car for my daughter, but am unwilling to give it to her, until I find a way to disable ALL doors, EXCEPT the drivers door from un-locking, when the pwr door locks are activated.

Ideally, I would like to find a remote activated system, that would allow her to unlock ONLY the drivers door, OR all doors if she has friends with her.

This is to me an issue of her safety, so I would appreciate fining some help with this... Otherwise, I'm going to sell the car, and get something with this security feature already installed...

Thanx,

The door locks operate on a vacum System.

I can't tell you if what you want to do will work or not, but someone might have an answer for you.

Give it a little bit of time to get some more responses.

Alon

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'92 300CE - Sold
2004 C240 - 744 - C7 Wheels - Android Radio
2002 C320 - 816 - Sport Wagon

The simple answer would be to disable the central locking altogether, the vacum pump in the 190 is under the rear seat. Disable this, and when you unlock the drivers door, only the drivers door will open, the rest of the doors and the boot lid will need to be done manually. However by doing this you will lose the locking function on the petrol filler flap.

Another way would be to consult any car alarm installer. They have loads of alarms that lock and unlock car doors...even start the car using the remote. They would be able to help you for sure.

cheers

Thanx for the info... Have been discussing this with several alarm installers. So far, ALL have indicated they are unable to do the Drivers door only...

I am POSITIVE there exists a means of doing what I want... Perhaps no-one has done this yet (other than to do as has been suggested, disable the vacuum source), but like I said, this is an issue of my daughter's security.

Any other ideas out there???

Thanx again...

Just so im clear here...

You want to be able to lock and unlock the drivers door without it effecting the other doors?

Then its either get a car without central locking or as mentioned earlier disable the pump so all the doors work manually. Dont forget though once inside the car, your daughter will no doubt lock the doors anyway, so a car with working central locking is much safer i would have thought, as she only has to press the lock on the drivers door and the whole thing is secure.

One other thing to remember, most cars have anti burst locks...ie in the event of an accident the doors will unlock to allow easier access to the emergency services. Disabling the central locking will of course remove this feature....which in its self is for driver and passenger safety.

Whats the main reason for you wanting to do this? I know you want it for security for your daughter, which is commendable, but how will it make it safer?

perhaps you can wire in a secondary vaccum pump to do the other doors and trunk seperate of the drivers door. via a switch in the car.

Alon

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'92 300CE - Sold
2004 C240 - 744 - C7 Wheels - Android Radio
2002 C320 - 816 - Sport Wagon

Well you can pull all of the other door panels besides drivers , plug off vacuum lines (make sure to superglue plugs to the vacuum lines cause of pressure) and leave the trunk and gas flap actuator connected and this will do what you want. You will have to manually lock the other doors though. I have installed a sylenoid a couple years ago that locks doors automatically when vehicle put in gear . If you can find a good Mercedes shop in the area you can have this done . Make sure they are qualified before they tamper with the system.

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euro 287
Mercedes Technician 7 Years (retired to Hyundai)
2000 Dodge Durango
98 Mazda truck

TO: Matt, Ashman & euro 287 (I hope I remembered everyone who responded, if not, please forgive my overlooking you...)

Anyway... Thanx much for the clever ideas & comments. I hadn't even thought about the possibility of a seperate vacuum system for the drivers & remaining doors... I believe I'm going to look into that a little deeper...

To euro... (OOPS... I goofed... This should be TO MATT... )

As for your question of how having ONLY the driver door open, makes the car safer for a woman... If you have a wife, or girfriend, or obviously not yet...a daughter, I'd suggest you enroll both them and yourself in a class (or classes) on self defense for women... Most local law enforcement agencies either put on, or can direct you to appropriate classes.

It's a sad commentary about our societies ability to cope... BUT... our female counterparts live in a different (significantly less safe, especially in larger metropolitan areas) world than we do... (In more ways than we usually make jokes about...)

Anyway... back to the reason... It does so, because when she's trying to get into her car in a darkened parking lot (like most evenings after classes at the local Community College), it allows her to get into the car ALONE... WITHOUT having to walk all the way around it to check and make sure someone with potentially harmful intent, is lurking on the passenger side...

Thanx again to all for the info & assistance...

Jeeper , I know where ya come from , wife is nursing student . Hospitals at 3:00 in morning . But one thing she is doing this year is taking consealed weapons class with me . ( she hunts with me all the time , she's a better shot than me now) Security is everything. Good luck and if you need any help well post it.

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euro 287
Mercedes Technician 7 Years (retired to Hyundai)
2000 Dodge Durango
98 Mazda truck

I agree with the guy who's wife is a hunter. Having and knowing how to use a personal sidearm is most definitely a life-saving skill, and it works when you are walking alone away from your car. You can get a good small semi-auto from a reputable gun store for $250. Lessons are available at most shooting ranges for maybe $50 from a trained NRA instructor. You'll never have to worry about your daughter's security again.

Joseph Monk
1985 190E War Pony 156K
(1992 Beretta 92FS - 15 shot mag)

With all due respect to the latest gent to chime in about how much better it would be to just go purchase a $250 hand-gun, I don't mean to come off sounding rude to you, nor to anyone else who may read this... BUT... I intend to leave gun ownership choices to others, without benefit of any comments from me, on EITHER side of gun ownership...

BECAUSE........

I have ZERO interest in turning this forum discussion about VEHICLE door locks, into one about weapons of ANY kind. This is NOT about guns, and NOT about weapons... This is about car (specifically 1985 Mercedes 190E) power door locks ONLY.

I'd appreciate staying focussed on door locks, and how to make them perform in the manner I'm looking to make them perform in.

To Euro:
You indicated that you had used a solenoid to activate the central locking system when the shifter was placed in gear. Would you mind sharing the specifics on how you accomplished this, such as part numbers used, perhaps a diagram of the wiring, and the installation? (perhaps even a picture ... BUT ONLY.. if it's easy to get to)

Since I've had minimal luck in finding someone to do this for me, (even the local Mercede's Dealers want NOTHING to do with it) it looks like I'm going to end up doing it on my own, so any assistance would be much appreciated.

Thanx again, Ob1jeeper

I agree on that statement. Anyways I remember we had to put in a switch like a brake like switch in front of shifter so when in park it would actuate the sylenoid to unlock but when taken out of gear it would lock. Now the exact wiring and all I dont remember from heart I would have to get a wiring diagram again of central locking and draw how the system would have to modified. I cannot believe no shops would take this task. We always take stuff like this cause of the challenge. Probably they dont want liability of cutting factory wiring. We look at it as just upgrading safety systems , sounds good huh. Let me remind you this modification was expensive about as much as a good alarm system but who puts a price on safety.

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euro 287
Mercedes Technician 7 Years (retired to Hyundai)
2000 Dodge Durango
98 Mazda truck

Thanx for the reply & the idea... I would n=have most lkely never thought of it on my own, but from the way you described how it works, it shouldn't be too difficult to figure out how to make it work, once I get the wiring diagrams.

I've ordered the manual on CD, which should arrive this weekend. I'll look it over good, and see what I can come up with.

My guess on the dealers here, is they don't want the liability of changing any of the "factory designed safety" systems... Must have gotten burned by some lawyers or something...

Thanx again...

Purchase a keyless entry which has a 3rd button, usually used for opening the trunk (~$30) . Obtain a solenoid used for locking/unlocking cars without a door key mechanism. (~$20)

Wire the keyless system normally to operate the vacuum system (your option to ignore if desired)

Wire the trunk open switch to the driver's door solenoid so that pressing that switch opens only the driver's door. A relay (~$8) may be necessary.

Purchase a whistle to be used in case of electronics failure.

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1993 MB190e 104k

I would close up the vacuum for the driver door, as well as disconnect the electrical connection. Then take the electrical connection, and wire it to w switch that would be mounted somewhere, I believe this is a 3 wire connection, one ground, one lock and unlock signal, simply use the driver door for getting in and if anyone else comes along unlock it from the inside, your system remains in propper condition you don't lose on it's functionality and you got what you wanted.

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