mercedes silver key - red light sometimes doesn't work

[totalkey]

this is with nec inside
and the remote doesn't always working and not start the car and not open
when i put the battery to place it will light 1 time and that it

what is common failure on it? soldering issue?
thanks
272772

[totalkey]

please assfor help me

[totalkey]

i realize that when i put the battery and the red light on for a sec its transmit the radio frequency- it should be like the ? maybe 1 button is shorting?
and if its shorting so the infra red doesn't work?

[Siham]

Try another with another bobine and new battery.
And check the capacitor.

[totalkey]

Try another with another bobine and new battery.
And check the capacitor.

What is bobine ?

[PierreTheron]

[QUOTE=totalkey;2357398]What is bobine ?
Here mate google is your friend ......
bobbin - definition of bobbin by The Free Dictionary (http://www.thefreedictionary.com/bobbin)

[totalkey]

you mean the infra red transmitter?

[kemaster]

I suppose he means "the coil". :joyous:

[Siham]

Sorry for late reply , can you read the key by infra-red?

[leandroks]

Bobine has to be coil, but the coil has nothing to do with frequency emmiting, it may be a crystal issue, try to swap it...

[totalkey]

It's ok just swap nec chip?

[totalkey]

anyone know if i can pcb from china key and changing the nec?
chrome key part number 5wk4 9046

[totalkey]

this will work OEM Smart Key for Mercedes-Benz 315MHZ (http://www.uobd2.net/wholesale/oem-smart-key-for-mercedes-benz-315mhzwithout-key-shell.html)
????

[iamfooser]

this will work OEM Smart Key for Mercedes-Benz 315MHZ (http://www.uobd2.net/wholesale/oem-smart-key-for-mercedes-benz-315mhzwithout-key-shell.html)
????

I have tried it, it cannot work. But even if it work, you will have quality issues. My suggestion to you is buy used original key from ebay or something since all you need is the pcb board.

[totalkey]

I have tried it, it cannot work. But even if it work, you will have quality issues. My suggestion to you is buy used original key from ebay or something since all you need is the pcb board.

ok , thank you

[aassfour]

Totalkey this is soldering issue or a button is shortning or might be other fault, check the back of the PCB usually the circuits get damaged easily and the battery holder might be loose so i would suggest instead of putting 2 batteries 2025 , put one 2025 and one 2032 that might solve the problem. and check if the soldering is clean on the nec .