Disable immobiliser Car do not start. Error message: Engin start blocked by immobiliser. What could be the problem?

Often, you need to press the unlock button on the remote twice. First press unlocks the door and second press disables the immobiliser and allows the vehicle to start. The key alone will not start the vehicle.

Alternatively, when the key is in the ignition - press the remote unlock again.

The remote acts as an immobiliser device. The reason your car won't start on the key is probably because the system won't allow any key in the ignition - it is preventing theft of the vehicle. Once the unlock button on the remote is pressed the system then recognises that key is the legitimate one for the vehicle and the disables the immobiliser and allows you to start the car

This Video guide may be useful for you. Good luck.

you cannot disable the immobiliser. it is a system mercedes has put into to prevent theft. however, you can bypass the immobiliser (otherwise known as EIS, Electronic Ignition Switch) in order to switch ON the car, but you wont be able to start it.
what you need to do it remove the connector from the back of the EIS module and bridge terminals 15r and terminal 30. i recommend getting a wiring diagram specific to your car to be sure of the terminals.

however, do this at your own risk.

you cannot disable the immobiliser. it is a system mercedes has put into to prevent theft. however, you can bypass the immobiliser (otherwise known as EIS, Electronic Ignition Switch) in order to switch ON the car, but you wont be able to start it.
what you need to do it remove the connector from the back of the EIS module and bridge terminals 15r and terminal 30. i recommend getting a wiring diagram specific to your car to be sure of the terminals.

however, do this at your own risk.

No. That the whole purpose of it , so that no one can steal it without having the proper key or code to disarm it .

Get a scanner from IPD and that will tell you what is wrong as well as give you the ability to clear any codes.
Foxwell NT 300 Diagnostic Scan Tool

THe key has a code in it that is read by the engine immobiliser. BY removing the key and reinserting you are giving the immobiliser a chance to read the code again. Give it a try. THe battery in your key may be getting low and needs replacing.

Hi There.
it may be the immobiliser,,, and then it may be that you need the ignition key code and/or ECU that goes with that particular model

Is it an automatic transmission?

Neutral Safety Switch not connected back to the linkage?

Put you foot on the brake switch
Put it to neutral ("N") and start the car
Put it back to PARK to warm up

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Stick shift

Is the clutch on safety sensor hook up?

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Alarm system relay disconnected?

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Oil pressure switch / wire not connected.

NO oil pressure will disable fuel pump.

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google this:disable the immobiliser on a starwaggon