Central Locking and Radio stopped working...??

[television]

sorry to jump on this thread but.

i have just bought a 2003 clk convertible, the 209 series and the only way i can open the door is by holding the key fob on the drivers door sensor but it does work every time but i do have to be close to the car, my radio reception seems fine and i have both key fobs and both have new battery's, it is driving me nuts. Any ides what could be wrong.
thanks.

Not had any problems on this one so far,, I can take a pep to see if there is anything on it

 

[mattk]

last 6 of chassis vin is 004732.
thanks

 

[television]

OK you have separate amps in your car for the RF locking and it will have to go on STAR to see what one has failed,, this really will be the best way to go, to save a lot of dismantling

 

[mattk]

ok thanks, just my luck no easy fix

 

[Mark1971]

Hi all, and in particular to Televison, for all your help with my central locking and radio reception problem.

Sorry it's taken so long but I just thought I'd reply and let you know that the problem has now been solved. It was the antenna amp in the rear window that was causing the issue and I solved it being a little crafty. A friend of mine works for Autoglass and I asked if they could replace the rear windscreen on my insurance as they have to replace the Amp atenna when they do it.

It cost me just £25 in the end on my insurance excess...If I had bought the amp on my own from Mercedes it was going to cost £360...without fitting.

But the upshot is that it all now works beautifully again...Radio reception and Central locking...

Just wanted to let you all know that's what the fault was and a BIG thankyou for everyones help...ESP Television..THANKYOU


Regards, Mark

 

[mattk]

Television.
Could you please tell me where i can locate the rear amp in my car as i am sure it is this that has gone or fused as i have just taken a telephone kit out of the car and on the coax cabel for ariel there is a black wire attatched and this wire has been cut and wired into the loom which may have fused the amp. Radio reception is weak when the ignition is off but when the ignition is on reception is much improved but not amazing.

 

[television]

I have your PM and will look into it as soon as possible

 

[mattk]

Thanks very much

 

[Pete Franklin]

Hi Guys, i have just found this forum and my car is having the same fault!
So i have the c350 v6 coupe and the vin is 203.756
can someone point me in the direction of the amp location please!
Many thanks

 

[Tao]

Hi,

I have a 2002 G500, 3 weeks ago both of the keyfob remote buttons stop working.
I've verified both keys battery infrared signal. I can see it using my phone camera.
I verified the fuses. Fuse 8 is ok
the doors locks and unlocks using the interior button on the central control button.
Radio works fine.
I scanned the car with my iCarsoft scanner and I found a status: Status Radio signal reception system : Not Active. I don't know what that means.

anyone knows what could be wrong?

Thanks

 

[Flyinspanner]

@Tao - maybe the receiver, maybe the amplifier, I know it’s fuse 8 on CLKs (linked to the alarm siren which often is the cause).

check which fuse the alarm system is on, in case it’s the siren on yours causing the issue (they possibly use the same unit on multiple models)

may need to get it to a good indie with full STAR to fully delve which item is the culprit.

 

[Botus]

Hi,

... and About a month ago the central locking wouldn't open with the key fob which at first I thought... maybe it's the key fob battery.

After testing the spare key fob and that not working either I thought maybe they might need new batteries and so I replaced them. That made no difference at all. I tested the key fobs using a digital camera and they seemed to be working fine showing the infra red.

.
However what I then noticed was that nearly all radio stations have virtually no reception on the radio as well...apart from a couple which are very strong signals..ie..radio 2 and the local radio station that I work for (those 2 are ok to recieve as far as reception is concerned)...otherwise no other stations can be heard clearly at all.

I can't help thinking that there's link here somewhere between the 2 issues.

First read and not got through any others yet....

But one thing stands out. Do you live near a large community of Easter Europe nationals or others?
In large parts of major cities all cars central locking stop working reliably or at the normal distance an owner is used to. Yet works normally in other parts. There are so many hackers and thieves they literately jam anything and everything 24/7.

On the radio side, I live near an unique dead spot where TV, Radio, DAB and Sat Nav stop functioning for a weird 20 metre band. The world we have created is a bit muddled so its not much surprise some cars are.

Saw one of my CCTV camera had been moved a few years back, reviewing footage and discovered 2 nice gentlemen all dressed in evil scary movie gear had been testing every car in the 8 houses it covers repeatedly. Next day, was in a mate's living room reviewing his footage. When I said that's the two walking down the street. His wife said you can't just say coz its two blokes 50m away its them... I said it is. Then we watched as they came into our close and retrieved a jamming device they'd planted 3 days earlier.

I went to have a chat outside with him, aside from him saying he'll stab me in the throat, turns out I interrupted an undercover sting about to arrest them.

The plod thought they done the whole road starting sometime after 02:00. I said funny coz they were here 22:40 !!! That's the nice one I can mention !!!

If you get CCTV it will scare the hell out of you what goes on outside you house all day. 9 out of 10 are not the sort of people you want out there ever

 

[Flyinspanner]

Mobile Telephone towers can also block signals nearby - used to go to a Tesco and there was one end of the car park that the remote locking on the Honda we had wouldn’t work (Toad 606 alarm)

 

[Tao]

@Tao - maybe the receiver, maybe the amplifier, I know it’s fuse 8 on CLKs (linked to the alarm siren which often is the cause).

check which fuse the alarm system is on, in case it’s the siren on yours causing the issue (they possibly use the same unit on multiple models)

may need to get it to a good indie with full STAR to fully delve which item is the culprit.

Hi Flyinspanner, thanks for the reply. According the the electrical documentation the Central locking system antenna is in the windscreen and has it's own amplifier that amplifier is linked to Fuse 8 (fuse is ok) which is also the fuse for the ATA system. Are you saying that a faulty siren is causing a problem on the Antenna/Amplifier?

Thanks

 

[Flyinspanner]

No, the alarm siren often fails and blows fuse 8 - as yours is ok, (and you have checked it, and that is the correct fuse) then it isn’t that.
If the siren has failed at some time in the past, and the fuse was replaced and is ok, it plays no further part in the problem.

it could be the receiver for the fob signal has a poor output/ the RF amp has a low output (could be poor connections on either) or maybe the key fob has a poor signal - loose components on the board?

Electrical problems can be a real pain to pinpoint sometimes.

 

[Botus]

like I said

https://www.bbc.com/news/uk-england-38225274

 

[peterws1957]

Hi Flyinspanner, thanks for the reply. According the the electrical documentation the Central locking system antenna is in the windscreen and has it's own amplifier that amplifier is linked to Fuse 8 (fuse is ok) which is also the fuse for the ATA system. Are you saying that a faulty siren is causing a problem on the Antenna/Amplifier?

Thanks

Exactly the same problem arose on another MB forum recently, only resolved by replacing the windscreen, the problem being a fault in the antenna.

 

[Tao]

Exactly the same problem arose on another MB forum recently, only resolved by replacing the windscreen, the problem being a fault in the antenna.

Is there a way to test that the antenna is broken?

@Botus, I live in Canada in a very typical Canadian neighbourhood. The car would stay there even if it's unlock all day

 

[mattkh]

........... I live in Canada in a very typical Canadian neighbourhood. The car would stay there even if it's unlock all day

What is Canada like for rusting the cars ??
Do you feel confident in looking inside the top light unit at the top of the front windscreen ?

 

[peterws1957]

Is there a way to test that the antenna is broken?

@Botus, I live in Canada in a very typical Canadian neighbourhood. The car would stay there even if it's unlock all day

I would guess the only way would be to get a Star diagnosis, presumably this would establish whether the amp is getting a signal. But that's purely a guess! I wouldn't be replacing the screen without a diagnosis that's for sure.