non working central locking w168 1999 v

[dean 123]

can anybody shed any light on why the central locking isnt working on my 1999 a class the vacum pump is working properly with the switch in the car but not from my key have changed the batteries but nothing

 

[television]

Can you see the IR beam in your digital camera

 

[dean 123]

i can see a red light shining in the key when i press it

 

[dean 123]

but no ir beam in my digital camera

 

[television]

It not the red light, you need to see the IR beam in a camera to be sure the key is ok

 

[dean 123]

i cant see the beam in my camera

 

[television]

I will come back to this later in the day, I have a horrible feeling that I may have been wrong and the 168 only has RF locking

 

[brandwooddixon]

Are you able to check with another key?
I suspect that your key is the problem.

 

[Steve@Avantgarde]

More likely to be the pump in the boot failed. They burn out for a past time.

 

[television]

More likely to be the pump in the boot failed. They burn out for a past time.

The locking works from in the car, is this not a siren fault possibly

 

[dean 123]

i have checked the pump it works fine i only have one key for the car doesnt seem to operate the boot lock tho but does work in the ignition ? there is a red light that flashes in the key when i press the button to lock or unlock if i disconnect battery then lock all doors and connect battery again all door pins rise so pump is defo working helllppp

 

[dean 123]

More likely to be the pump in the boot failed. They burn out for a past time.

pump is working definitely

 

[dean 123]

i only have one key for the car

 

[television]

member dec is back on line and he will deal with it as he knows these cars well now

 

[Dec]

I don’t know anything about these cars but this man does… http://www.aclassinfo.co.uk/mypage.1.htm

“Synchronising the locking system
If the vehicle cannot be locked or unlocked, first check the the remote control unit batteries.
If the battery charge indicator lamp light up , this means the system needs to be synchronised.

To do this:
Direct the remote control unit at the car and briefly press the lock or unlock symbols on the key fob twice within approx 30 seconds, place the key in the ignition lock and turn to position 2, the locking system is again operative.” …above source… http://www.aclassinfo.co.uk/mypage.6a.htm

If synchronising the remote doesn’t solve your fault then check the condition of the vacuum pump electrical connections and the PCB inside the vacuum pump, see… http://www.aclassinfo.co.uk/mypage.41.htm


Dec

 

[dean 123]

i have checked the vacum pump and it looks in excellent condititon so do all the connections to it i have tried syncing the key to no avail

 

[Dec]

Is this car new to you or have you ever witnessed the central locking working as it should via the remote control?
Is it a 2 button remote?
Flip out blade, type?

Dec

 

[dean 123]

the car is new to me bought it in a bit of a sorry state and am slowly getting it ready to go on the road the key is the two button flip out blade type yes

 

[dean 123]

the central locking has never worked from the remote as when i bought the car it was winched onto a recovery wagon as the battery negative wire had been disconnected from the battery

 

[Dec]

Did you take the vacuum pump apart to see if the PrintedCuircutBoard has any damage/corrosion?
Example pictures of a different vacuum pump below…
See post #46 here… http://forums.mercedesclub.org.uk/showthread.php?t=64422&page=5

Dec