KeyFob, starts car, but wont lock/open

HelpThisDude

Senior Member
Joined
Dec 2, 2008
Messages
649
Reaction score
5
Location
Essex
Your Mercedes
W203 C270CDI, R172 SLK55 AMG
Hello all :)

My key fob started playing up....
It will always start the car, but when I try to lock/ open the doors it wont work, not even on the IR.
Then out of the blue it will work all day.... till it suddenly decides to stop again.

They red led on the key always lights, batts are new, the car radio still gets it's stations, and the doors lock with the dash button.

What could be the problem?

(2001 C270 CDi, three button remote, removable blade key type)
 
OP
HelpThisDude

HelpThisDude

Senior Member
Joined
Dec 2, 2008
Messages
649
Reaction score
5
Location
Essex
Your Mercedes
W203 C270CDI, R172 SLK55 AMG
  • Thread Starter
  • Thread starter
  • #2
Any suggestions before I just buy another key? Its done it again today, would not lock at the station, would not unlock on my return (used the metal key to get in).
But Locked fine, just as I got home.
 

television

Always remembered RIP
Joined
Mar 14, 2005
Messages
164,073
Reaction score
367
Age
89
Location
Daventry
Your Mercedes
2002 SL500, 216 CL500, all fully loaded
This could just be a through hole plating fault.
There is 2 parts to it,, the long range RF and the close range when you point it at the door handle.

To see if the key is working when it will not unlock, point the key into a digital camera and see if you can see the beam.

I thought I answered yesterday, but I must have forgotten to push the post button
 

Attachments

  • Picture 249.jpg
    Picture 249.jpg
    26.7 KB · Views: 41
OP
HelpThisDude

HelpThisDude

Senior Member
Joined
Dec 2, 2008
Messages
649
Reaction score
5
Location
Essex
Your Mercedes
W203 C270CDI, R172 SLK55 AMG
  • Thread Starter
  • Thread starter
  • #4
Cheers Malcom, I will try that :)
 
A

andy@pcd-ltd

Guest
Have you got a spare key to try using that for a while and see how you get on if it doesnt play up at all then you know its the key
 
OP
HelpThisDude

HelpThisDude

Senior Member
Joined
Dec 2, 2008
Messages
649
Reaction score
5
Location
Essex
Your Mercedes
W203 C270CDI, R172 SLK55 AMG
  • Thread Starter
  • Thread starter
  • #6
Thank you Willow, Always a good idea, but as with all my problems it is never that easy.... :)
My spare key used to be the main key, but it had issues, thats why I had been using this key.
 
A

andy@pcd-ltd

Guest
What issuse did you have with the main key before you swapped to the spare
 

television

Always remembered RIP
Joined
Mar 14, 2005
Messages
164,073
Reaction score
367
Age
89
Location
Daventry
Your Mercedes
2002 SL500, 216 CL500, all fully loaded
You could always post to me the spare key to see if I can fix it
 
OP
HelpThisDude

HelpThisDude

Senior Member
Joined
Dec 2, 2008
Messages
649
Reaction score
5
Location
Essex
Your Mercedes
W203 C270CDI, R172 SLK55 AMG
  • Thread Starter
  • Thread starter
  • #9
Wow, yeah if you think you can fix it Malcom, I shall send it over. It starts the car ok, just sometimes it gives up opening and locking, when this happens there is no red led on the remote. But when ever the LED flashes (after a soft technical tap) it works fine.
Its in a right state, the plastic over the keys are all cracked from use.

I would like to just check if the IR beam is visible when the red keyfob LED wont light....
 

television

Always remembered RIP
Joined
Mar 14, 2005
Messages
164,073
Reaction score
367
Age
89
Location
Daventry
Your Mercedes
2002 SL500, 216 CL500, all fully loaded
I can fix most of the faults and have a few good cases
 
OP
HelpThisDude

HelpThisDude

Senior Member
Joined
Dec 2, 2008
Messages
649
Reaction score
5
Location
Essex
Your Mercedes
W203 C270CDI, R172 SLK55 AMG
  • Thread Starter
  • Thread starter
  • #11
Excellent. Thank you very much, I'll PM you my e mail, let me know where to send it :)
 
OP
HelpThisDude

HelpThisDude

Senior Member
Joined
Dec 2, 2008
Messages
649
Reaction score
5
Location
Essex
Your Mercedes
W203 C270CDI, R172 SLK55 AMG
  • Thread Starter
  • Thread starter
  • #12
Finally got it to fail again.
But it took for me to put the key in the car, for it to fail.
I had been locking and unlocking from outside every so often trying to re create the fault.
While it was failed, I checked with the camera, and I could see a beam.

Messed with the key in the ignition a few time and tried to lock and it worked, is this fluke or could this have affected anything?
 

television

Always remembered RIP
Joined
Mar 14, 2005
Messages
164,073
Reaction score
367
Age
89
Location
Daventry
Your Mercedes
2002 SL500, 216 CL500, all fully loaded
Then I do not think key problems
 
OP
HelpThisDude

HelpThisDude

Senior Member
Joined
Dec 2, 2008
Messages
649
Reaction score
5
Location
Essex
Your Mercedes
W203 C270CDI, R172 SLK55 AMG
  • Thread Starter
  • Thread starter
  • #14
:(
Anything else I can try with this key?

I would still like you too have ago with my worn out key, if thats OK.
 

television

Always remembered RIP
Joined
Mar 14, 2005
Messages
164,073
Reaction score
367
Age
89
Location
Daventry
Your Mercedes
2002 SL500, 216 CL500, all fully loaded
:(
Anything else I can try with this key?

I would still like you too have ago with my worn out key, if thats OK.

Yes that is fine if you can hang on a bit longer
 
OP
HelpThisDude

HelpThisDude

Senior Member
Joined
Dec 2, 2008
Messages
649
Reaction score
5
Location
Essex
Your Mercedes
W203 C270CDI, R172 SLK55 AMG
  • Thread Starter
  • Thread starter
  • #16
Yup, no probs
Cheers.
 
OP
HelpThisDude

HelpThisDude

Senior Member
Joined
Dec 2, 2008
Messages
649
Reaction score
5
Location
Essex
Your Mercedes
W203 C270CDI, R172 SLK55 AMG
  • Thread Starter
  • Thread starter
  • #17
Any further ideas on testing I could do Malcom?
 
OP
HelpThisDude

HelpThisDude

Senior Member
Joined
Dec 2, 2008
Messages
649
Reaction score
5
Location
Essex
Your Mercedes
W203 C270CDI, R172 SLK55 AMG
  • Thread Starter
  • Thread starter
  • #19
Sorry Malcom, can I get your address to post my key to.
You should have an IM from me with my e mail.
Cheers.
 

television

Always remembered RIP
Joined
Mar 14, 2005
Messages
164,073
Reaction score
367
Age
89
Location
Daventry
Your Mercedes
2002 SL500, 216 CL500, all fully loaded
Sorry Malcom, can I get your address to post my key to.
You should have an IM from me with my e mail.
Cheers.

I will attend to my PM's in the morning,,there is 25 in the box to answer
 

Stop looking for the Best Garage!! We are here and have the best advanced solutions for you, at Competitive prices. Put us to test with any issue you may have.
Top Bottom