key broke and fixed!!!
#1
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2003 c240 4matic wagon
key broke and fixed!!!
well after 7 years my orig key finally died it would not lock the car it would open and start but not lock
1st i thought it was my wife being stupid but i tried it and no
so i opened it up and found the lock button on the circut board had broken off (pointing to location in pic button is in top of pic)
so i figured id try and solder it back on i couldent really break it any more!
and it worked!!
and here are all the key pieces
1st i thought it was my wife being stupid but i tried it and no
so i opened it up and found the lock button on the circut board had broken off (pointing to location in pic button is in top of pic)
so i figured id try and solder it back on i couldent really break it any more!
and it worked!!
and here are all the key pieces
#3
Super Moderator
you do realize you have to solder the memory chip off the old one and on to the new key without screwing up any of the pins right If so have fun it does work hope you have mad soldering skills
#4
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C320 2002
Why would you have to do any soldering. The internal board could easily be swapped out and replaced with your other key. It has been done before on here by someone. Why do you think ppl still pay 40 dollars on ebay for the new keys. When they can't even be programmed.?
#5
Super Moderator
oh you mean new old key ok sorry i thought you meant buy the new style key and put the old bored in to it.
#7
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2006 C230 Sedan
wait.. doesn't his internal has all the functions. I counted 4. Which is the same as our sedans.
Perhaps if he get the plastic casing as our and it would work?
Perhaps if he get the plastic casing as our and it would work?
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#8
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2003 c240
That's what i did. someone left their mercedes key at a friends dry cleaner and never came back for it so i took it and gutted it out and replaced it with mine. works great but the chip will no longer stay locked inside since you have to break the lock to get it out. No matter though, since it's only opened occasionally for battery replacement.
#9
Super Member
To test, Contact148 should use key without plastic key cover and press trunk button,... if it unlocks his trunk then replacing his 2-button plastic key cover with a 3-4 button one will give him remote trunk unlock functionality.
Likely ditto for panic function, if he has factory alarm.
#10
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2003 C230K Coupe Orion Blue
The trunk button works on ALL cars. Been using a 4-button (Panic, Lock, Unlock, Trunk) key casing for the last few years on my coupe.
My Panic button doesn't work though as I don't have the factory alarm. Alarm doesn't come standard on Canadian vehicles. The Trunk button does work, but it's rather useless as the coupe hatch is too heavy to lift under its own power. That'd be pimp though.
My Panic button doesn't work though as I don't have the factory alarm. Alarm doesn't come standard on Canadian vehicles. The Trunk button does work, but it's rather useless as the coupe hatch is too heavy to lift under its own power. That'd be pimp though.
#12
Super Member
From my experience,... the trunk button has to be press and hold (until trunk unlock),... and done close to the trunk .
#13
Newbie
well after 7 years my orig key finally died it would not lock the car it would open and start but not lock
1st i thought it was my wife being stupid but i tried it and no
so i opened it up and found the lock button on the circut board had broken off (pointing to location in pic button is in top of pic)
so i figured id try and solder it back on i couldent really break it any more!
and it worked!!
and here are all the key pieces
1st i thought it was my wife being stupid but i tried it and no
so i opened it up and found the lock button on the circut board had broken off (pointing to location in pic button is in top of pic)
so i figured id try and solder it back on i couldent really break it any more!
and it worked!!
and here are all the key pieces
Same happened to me, and you probably saved me av few hundred bucks.
Thanks!
AnonymBruker
#14
Junior Member
Fixed my key too
I dropped my key yesterday and this afternoon I noticed the car did not recognize my key when I tried to start it. It still unlocked the doors but the steering lock would not disengage, and the ignition did not come on. After several attempts inserting the key I could start the car, but the gauges and rev counter did not work. The headlights also turned on, even though it was daylight.
I took the key apart, and found that a coil had broken loose and was making intermittent contact, which allowed me to drive the car home. The wire that came loose is so fine, I had to use a jewellers loupe to see where it had broken loose. (Could also have been my failing eyesight)
I soldered the wire, with quite a bit of effort and being very careful not to burn the coil itself, and it now works again.
Soldered on the bottom corner
Observe the meticulously placed drop of solder in the lower right corner below the coil
I took the key apart, and found that a coil had broken loose and was making intermittent contact, which allowed me to drive the car home. The wire that came loose is so fine, I had to use a jewellers loupe to see where it had broken loose. (Could also have been my failing eyesight)
I soldered the wire, with quite a bit of effort and being very careful not to burn the coil itself, and it now works again.
Soldered on the bottom corner
Observe the meticulously placed drop of solder in the lower right corner below the coil
#15
Junior Member
Dropped and broke the key again. Upon careful scrutiny it was discovered that the point where I last soldered the coil has no electrical connection. It is purely mechanical, to hold the coil in position.
I wonder if someone can reply to this question...Is the positioning of the coil in the fob so critical that when it moves 1 or 2 mm out of position it will fail?
I wonder if someone can reply to this question...Is the positioning of the coil in the fob so critical that when it moves 1 or 2 mm out of position it will fail?