lock problem(only in cold weather)c220

[beckham7]

hello people,
i have 95 c220 and the problem is when i lock the car it unlocks after 10-15 seconds i,ve tried the remote and locking manually it has been fine up until 2 days ago it is -12 here in sweden and its gonna get a lot colder,please help as i have to leave it unlocked everywhere i go it is alarmed/immobiliser on it but its bugging me what the problem can be
thankyou in advance gary :cry:

 

[beckham7]

hellllllllllppppppppppppp
anyone?

 

[beckham7]

bttt as its winter again..............
car was fine all through summer now its getting cold again it keeps unlocking itself

 

[Myros]

sorry if this sounds obvious

Firstly, I'd get some good quality graphite lock lubricant and squirt it into all the locks and work it in good and proper with the key. Then check the vacuum connections in the boot up by the petrol flap . If none of that helps, you might have to start taking the doors apart to see what goes on with the door actuators. You could end up consulting wiring diagrams to get to the bottom of this. Hopefully, someone else has beaten this in the past and can give you a more specific answer. Good luck.