e200 infrared key

carl2

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hi all... when i put the infrared key into the ignition and nothing happened, the car does not seem to recognise the key at all, the steering lock will not move and when i normally put the key into the ignition i hear a click and the steering lock releases and i can then start the engine, nothing at all happens, i have tried the spare key and the master key but nothing at all.......help
 

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Is the car a 210 after 1999 or there abouts
 

turbopete

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hello and welcome

not a very happy first post for you it seems. has the car had a flat battery for a long period or is it a case of it was fine 1 day then wont work the next? by trying all your keys i think we can eliminate the key being at fault, do it sounds like a fault on the sensor where the key fits to unlock the steering etc (sorry i cant remember what its called but im sure someone knows the thing im meaning!)
 
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carl2

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hi its a 1997 E200 on a p it was fine went to work parked it up then nothink had the key checked its ok open`s and lock`s the door`s fine been told its the ignition switch and its only the dealer that can do it.....£500 plus....omg
 

turbopete

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thats what i wa thinking. sometimes its given a technical name and thats what i was trying to think of, the name of the system! but yes the switch sounds like a probable culprit!
 

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Yes it does sound like the ignition switch has failed,,the only thing that I know of is to leave the key in the lock for up to 90mins
 

bigasotonuk

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Hi,
Welcome to the forum,
Just to clarify have you got a single button key with the key blade that flips out?
Or a 2/3 button electonic key? If the latter key, try your spare key if this still does not release the steering lock, then I think a new EIS switch is needed (ignition switch) but if you have only the one key, its a gamble, buy yourself a new key and it may work as the problem could be your key, or it may not work with the new key either and you have still have to replace the EIS switch and your £200 lighter for the new key.
If it was mine and I only had one key, I would have to go the new key route because at least if you had to replace EIS switch you would still have spare key.
 
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carl2

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hi its the 3 button key no i dont have a spare one....had the key tested came back ok.....but yes i could do with a spare one....
 

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How did you test the key,, the putting it in front of a camera is only for the locking,,shake the key and see if it rattles inside
 
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carl2

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no m8 tested it on a infered sensor pad just pressed the buttions came back ok allso done it with a camera phone....but am thinking how does the ignition know the key is in when i put the head lights on and take the key out the buzzer goes off 2 say i have left the lights on....if that helps @ all
 

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You key has 2 parts to it,,the camera test will not test the ignition switch part of it. I asked before, does it rattle if you shake it
 

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sorry no m8

So now we have a position where it could be the key or the switch

Inside the key a coil can break away
 

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carl2

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took it apart coil still on but copper wire around it does not look to good very loose found a end thats not attached
 

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Then end near the tip does come loose,that is why the coil falls off,,the connections are both at the other end , one each side of the plastic coil holder, you need to do a continuity test over those two connections
 
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carl2

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will do m8 get back 2u thanks 4 ure help
 
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carl2

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hi sorry took so long 2 get back done the continuity test got no reading back........looks like a trip 2 dealers for a new key[/QUOTE]
 

television

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Often the coil is faulty or broken,, many types out there as well
 


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