e200kompresor

Hello I have a Mercedes W211 E200 kompresor of 2005.About 3 months ago appeard on the screen Battery protection convenience function temp unavailable (both batteries are produced in 2005),when I measured the auxillary battery its values were ok and I changed the rear battery,the note Battery protection convenience function temp unavailable was still on,so I replaced the old one again.I want to find a solution...can anyone of you tell me what to do? THANK YOU!

jimbo1763

I am a little confused. Did you replace the auxiliary battery or only the main battery in the rear?

e200kompresor

Just the rear battery

jimbo1763

If your aux battery is 12 years old, it may be time to change it as well. I suggest you do that. The cars rely on a strong electronic/battery system, and if your battery is 12 years old, you certainly have gotten your value out of it.

e200kompresor

you mean to change the auxillary one or both batteries,because when I changed the rear one the note appeard on the screen?

jimbo1763

If you have already replaced the main one, I suggest you also replace the auxiliary one under the hood. The message you are getting often arises when the aux battery is giving out/not holding a charge properly.

e200kompresor

Thank you for the advice!

jimbo1763

Post back after you change it out and let us know.

Cheers.

e200kompresor

Hello ,I changed both batteries and still the notification appeard,so after the diagnosis the fault was that the battery module needed to be updated and to re-progam the rear SAM,wich I have changed 2 months ago..finally the notification has gone.
Thank you!

ammartin

I get this mention on my 2005 SL500 MBZ for about 16 to 20 minutes of starting the car!....After the 15 to 20 minutes I guess it charges it up, whatever the problem is?......This is not normal to be with convenience functions for 20 or so minutes every time, right?....Can anyone out there tell me what the problem may be?....

Also, I was told that I might want to look into an Isolator Battery to prevent the auxiliary battery from drawing too much power?.....Someone please give some directions and advice on how to resolve this problem "Convenience Functions Currently Unavailable"????

jimbo1763

You should check the condition of the auxiliary battery under the hood and probably be ready to change it out. You may well still have the original, and if you got 12 years out of it, you did well. The changeout is really simple. It is about the size of a lawn mower/motorcycle battery.

Can't help you on the isolator part. You may not need anything like that if your battery is simply old and worn out.

ammartin

My Auxiliary Battery is only 4 years old!.....I do not want to spend another $200 for one again!.....Are you sure it is that battery?.....The convenience functions goes away after driving it around 20 minutes or so!...I have a sub woofer and amp in the trunk of my car running the stereo system!....That is why I mentioned a ISO Battery!.....I also have a blinking parking light problem!....The passenger side parking light flickers on and off, then stays off completely, but sometimes comes back on, do you know what that can be!...Not the bulb neither!!