Smart & Connected Life Connected Car Tech 1,120. I managed to use the physical lock on the boot to get into the car, from there I could get the doors open, but turning the key in the car won't turn it on (again - the immobiliser is still on). Well we are stumped on this one!Took my 2005 pure to Uncle Glenn's shop in London today.Glenn changed the inter cooler fan assembly for me : )Have an issue with the drivers door (actually all the doors) not locking on occasion.We took the drivers door skin off and hooked up three other different door lock mechanisms to the wire assembly and none of them would "lock up" using the key ⦠You'll need to place the "smart" key ⦠In that case, by design, the car will not lock with the fob but it will with the key. However, there could still be an electrical problem. Car power locks offer great convenience, with remote key access and one-button locking and unlocking for all your doors. For instance, if the battery in the electronic key dies, you wonât ⦠Hi My Smart isn't responding to the smart key - this is very annoying as it's not possible to turn off the immobiliser. So with a failed boot sensor, the car will never lock on the fob! Then check the fuses for the central locking circuit (controls the vacuum operated door locking mechanism, which uses pressure to lock all the doors at the same time), antenna module, and AAM. But with more mechanisms and electronics involved, the greater the chance of something going awry â which doesn't even consider "smart key" technology, a feature more car manufacturers are expected ⦠The last time I towed I just locked the spare key (fob & all) in the car by hitting the lock button with the door open prior to switching off the battery. However, there may be times when the electronic key doesnât communicate with the car. The key fob battery may drain, often causing a dead key fob for the next driver; The car battery may drain, often causing a dead car battery for the next driver; The car may not lock properly: some cars with "smart" keys are programmed to block the locking mechanism if the key is within the car. The most common type of car key used to be the traditional car key, which was mostly just a physical key that was used to engage your car door locks and work in conjunction with your ignition. Chances are, if you own a vehicle that was manufactured before 1995, then your car keys are the more traditional kind. The fob can be set to open all doors together on one press of the fob or driver's door and boot only on first press and other doors on a second press. These could be replaced or you could replace the entire lock. If you are able to lock and unlock the doors with the physical key, then the locks are probably fine mechanically. You can rule part of this out by locking and unlocking all of the doors via the physical primary control ⦠Hi there, my W204 c-class fob would not lock the car. Your carâs smart key system allows you to lock and unlock the doors, and even crank the engine without having to use a physical key or even press a button on the remote. One possibility is that the lock cylinder needs new tumblers. I have yet seen a problem with the repeated removing of the FOB from the blank. I've flat towed my smart about 20 times since last April. even though the fob unlock it if I manually lock the 4 doors. There's no evidence of any power in the car - the lights/radio won't ⦠Re: Urgent : my car wont lock (it stays open) You should be able to central lock it on the key - just look above the lock on the driver's side and you will see a small circle on the grey triangular plastic trim, gentley lever this out and you will find a key hole. the fob unlocks and opens the trunk, but it just wouldnât lock the car. If your car door will not unlock with the key, but the key is still working to start the car, then the problem is most likely with the lock on your car door rather than the key. Read on for potential problem areas. Next, try taking the emergency metal key out of the fob and using it to manually unlock the carâs doors. Before now, if I remove the silver key from the fob and I use it to unlock the car manually, it begins to sound an alarm, but now it doesnât sound that alarm anymore.