Bluetooth audio/telephone

[scotthind]

Morning everyone.
Scott here, new to owning a Mercedes, just brought a Class amg executive line.
I just wondered if anyone could help with a problem I’m having, since buying the car on Tuesday, the Bluetooth audio is stuck saying activating bluetooth audio, and the the phone as activating telephone, as I said, it’s been doing that since Tuesday. I’ve tried the reset that you can do with using the center consul and it’s still the same, it’s very frustrating!
Any help or ideas of what could be causing it would be appreciated. Don’t want to take it to a garage and be changed a fortune for somthing that may or may not be a easy fix.
Thanks for your help.
Scott

 

[Botus]

ummm not sure, others might pop up with more experience - I think I'd try getting it powered down and see if it boots up normally

funny doing some work on my car I threw it in a tail spin from hell, where nothing worked and diagnostics couldn't help as it had lost comunication with the main controller - I was advised to disconnect the car battery for 20 mins - and to my amazement it was right as rain - you hear this "battery reset" idea on BMWs as a normal course of action when you've confused it enough - but I actually thought in the Merc world that it was a mumbo-jumbo lie - but I've had to do it two weekends in a row trying to push certain modules back to iterations of software before Merc updated it with unsuitable incompatible rubbish - using their fault free Dealer only Online SCN'd updating perfection...

 

[scotthind]

ummm not sure, others might pop up with more experience - I think I'd try getting it powered down and see if it boots up normally

funny doing some work on my car I threw it in a tail spin from hell where nothing worked and diagnostics couldn't help - disconnected the car batter for 20 mins and it was right as rain - you hear this "battery reset" idea on BMWs as a normal course of action when you've confused it enough - but I actually thought in the Merc world that was a mumbo-jumbo lie - but I've had to do it two weekends in a row trying to push certain modules back to iterations of software where Merc didn't update it with unsuitable incompatible rubbish - with their perfect Online SCN'd perfection

Thanks your reply mate, you have a lot better idea than I do! I read about the battery disconnection thing so I might try that, worth a go. It’s really frustrating. I can take it back to the dealer where I got it from, but it’s a right old trek out!

 

[Botus]

after re connecting, you should only need to do the windows / sunroof, down / up - and hold for a few seconds thing (to reset the anti-trap features) other than that the car shouldn't care less if you disconnect the battery

of course engine OFF and unlock the car first - or the alarm gets alarmed, and give it a good 15 to 20 mins - will be interesting to see what happend - the other one would be to get the comand to the services menu and find (youtube) how to get in the comand secret Eng menu - and reboot it from there

 

[scotthind]

I’ll let you what happens when I manage to work out how to remove the battery! What happened to just two bolts!!

 

[Botus]

only need to take off the earth connection - the battery can stay in the car

 

[scotthind]

only need to take off the earth connection - the battery can stay in the car

Tried it this morning, and it hasn’t worked unfortunately. I’ve tried everything now so maybe it’s a garage job.
Although I only disconnected the red battery terminal, that should have been fine shouldn’t it?

 

[EmilysDad]

....
Although I only disconnected the red battery terminal, that should have been fine shouldn’t it?

When disconnecting a battery its standard/good practice to disconnect the negative post first because if you accidentally touch the body with the spanner at the same time it won't matter as they'd both be the same electrically.
If you'd touched the body while disconnecting the positive terminal you'd have potentially welded your spanner to the body.
Can't help with your radio/sounds though

 

[scotthind]

Oh god, and it was raining aswell

 

[Botus]

Re your pics

everything in the pictures is saying it can't find the phone to make the connections and it keeps trying - so if not a confused brain / hardware fault - can you try and delete the cars memory on any device its used and or temporarily turn off the bluetooth functions on the car. Then report back what happened

You have two separate connections to the phone one for telephony and one for music streaming. If above gets over itself - try to add just one phone using the phone to find the car (since a change in who's looking for whom in 2012, the car is always visible for devices) and agree on whichever device says remember, so you don't get a one off reaction that's no use to anyone...

 

[scotthind]

everything in the pictures is saying it can't find the phone to make the connections and it keeps trying - so if not a confused brain / hardware fault - can you try and delete the cars memory on any device its used and or temporarily turn off the bluetooth functions on the car. Then report back what happened

You have two separate connections to the phone one for telephony and one for music streaming. If above gets over itself - try to add just one phone using the phone to find the car (since a change in who's looking for whom in 2012, the car is always visible for devices) and agree on whichever device says remember, so you don't get a one off reaction that's no use to anyone...

How do you turn off blue tooth on the car, the active Bluetooth won’t let me chose that option as the picture shows. I have never managed to connect a phone via the Bluetooth so I don’t have anything to forget unfortunately.
Also I have done a reset on the screen and it stays the same. I’m guessing it must be a hardware fault as it’s been doing the for 6 days now.

 

[scotthind]

How do you turn off blue tooth on the car, the active Bluetooth won’t let me chose that option as the picture shows. I have never managed to connect a phone via the Bluetooth so I don’t have anything to forget unfortunately.
Also I have done a reset on the screen and it stays the same. I’m guessing it must be a hardware fault as it’s been doing the for 6 days now.

Could pulling a fuse work? Could a fuse be blown maybe?

 

[Blobcat]

How do you turn off blue tooth on the car, the active Bluetooth won’t let me chose that option as the picture shows. I have never managed to connect a phone via the Bluetooth so I don’t have anything to forget unfortunately.
Also I have done a reset on the screen and it stays the same. I’m guessing it must be a hardware fault as it’s been doing the for 6 days now.

You’ll have an option somewhere buried in the options to see what bluetooth devices are registered. As per above delete all you find - there is a limit to how many can be registered so it might have reached its limit

 

[scotthind]

Cheers for the help guys. Im unable to go into Bluetooth devices, that option is blacked out for some reason. I can’t even find the car when I search for Bluetooth on my phone. Think it’s going to have to go back to the garage, which is a pain as it’s so far away!

 

[Botus]

finding fuses in modern cars is hard work, its not 6 in one sensible place like the good old days - and due to the muddled way they build cars, some devices can get curent via a other means the manu didn't expect / don't talk about - its why we pulled the battery off - easier to do, and kills all modules regardless of the interesting wiring set up the manus don't even understand they achieved

was a big article about this re a Merc issue - some super heroes proved Merc didn't have their wiring diagrams right !!! https://pmmonline.co.uk/technical/scantec-uncovers-parasitic-battery-drain-cause/

ZGW (central gateway) – ‘U116000 BUS keep awake unit was detected’. But initial checks showed that the vehicle was correctly shutting down in the expected timeframe. Whilst manufacturer wiring diagrams confirmed the vehicle utilises 6 different networks, sporadically we found a battery drain would rise all of a sudden up to approximately 2.8A, four seconds later the two interior CAN networks would then wake up, one second later the current would rise steeply to over 10A, settle back down to 6A, and then within roughly five seconds, the drain and network activity could drop off and resume back to the standard 25mA

A check of the wiring diagrams suggested that this could only be caused by the air conditioning (A/C) control module; although the heater blower motor module ultimately runs the fan motor assembly, the fan motor module is a LIN slave and therefore is incapable of waking the interior CAN. However, the A/C control module can wake the interior CAN and does command the fan module as it’s the LIN master. With only one terminal 30 (battery) fuse for the A/C module in the front SAM fuse box we removed the fuse - but the battery drain remained in play !!! What we didn’t realise was there was another wire running between the A/C control module and the front SAM that had absolutely no designation or terminal markings, which also supplied power to the A/C module