Question about Mercedes-Benz Cars & Trucks
Good morning...! I'm having an issue with my 2007 ML350 locking system. When the vehicle is in motion it will lock itself as it would normally do. The problem is that after a coouple of minutes it will unlock itself while driving. Regardless if I lock it back, it will eventually unlock itself again. While the system is unlocked (while driving) you can hear a little noise coming from the doors, as if the system is trying to lock itself back, but unable to. Could you pleae assist and let me know what should I do...? Thanks...!
Posted by Anonymous on
Check if one of the doors is poorly closed, includes the rear cargo
Also check the pushbuttons of each door that turns on the interior light
Posted on May 12, 2017
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Posted on Jan 02, 2017
I had exactly the same problem and there are 2 ways of solving it. The first is to pay your Audi Service Centre £350-£550 to replace it for you and the second way is to do it yourself which will cost well under £100 (depending on ebay). Firstly check the Central Locking Pump to make sure the hoses haven't come off. This is located in the very back right hand corner of the boot so you will need to remove the carpet and internal trim and you will see a block of sponge. Carefully lift the top off this and you will see the pump sat inside it.
Actually there is a great set of photos online to help you and I will add the link for you at the end. If the hoses are still connected and not leaking it is very likely that the internal compressor wheel has shattered (quite a common fault). I believe it is possible to open the pump and replace this wheel (in fact there is one for sale on a very popular auction site at the moment) but my own preference was to simply buy a whole new pump and replace that (£16.00 + £8 p+p off the same auction site).
The most important thing for you to remember is that when you look to buy a replacement pump you need to find one with the EXACT same serial number. The one in the diagram shown is
8LO 862 257 N but I have a sneaky feeling yours might end in an A.
Anyway, I hope this is of some help and dont worry about the connections as both air connectors and all 3 electrical ones are different sizes and will only fit in one place each.
Posted on Aug 19, 2008
SOURCE: Passenger door won't unlock
Flip the power lock switch on your dash (twice). Once only unlocks the drivers side door, twice unlocks the passenger side door and the hatchback. Good luck!
Posted on Jan 31, 2009
SOURCE: central locking on megane 2000
is yours the renault keycard to start and open doors?if it is a know these cards can go faulty.they were bad on renault laguna.the switch breaks off the board inside card.can be soldered back on.think you can get replacement switch kit on ebay with instructions how to fix.need someone who can solder with some eletronics knowhow.if not not sure sorry
Posted on Jun 07, 2009
Hi there, this is a very common fault, what ever side door the noise is coming from you need to replace the door actuator to cure the noise, Ive done loads of these, not sure how much it is though, hope this helps.
Posted on Jun 07, 2009
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