Audi A6 2.0 TDI 10/2006 c6 change battery

[control676]

Dear all,
I have an AUDI A6 C6 2.0 TDI Multritronic 10/2006. In the last start I observed that the power of battery is too low, also on driving I observed some strange things, on gear box, on power etc.
(1) is this normal? when a battery has not good power BUT the car started to be the car like this?
(2) the car has a 95Ah VARTA battery...can I charge it when it is connected to the car? OR I must remove it? I tried to remove it and the alarm activated??
(3) If i replace the battery with 90Ah or 100 Ah battery has any problem? OR I must find the 95Ah battery?
(4) if i replace it, may I do anything on the system of car or it will be normal from the first minute?

I appreciated if you can help me in these 4 questions

thanks a lot

best regards

[Guest 2]

Did you do a search? This topic comes up pretty frequent. Try 'battery' and sect this section to search from.


Sent from my iPhone using Tapatalk

[control676]

Did you do a search? This topic comes up pretty frequent. Try 'battery' and sect this section to search from.


Sent from my iPhone using Tapatalk

hi and thanks for ur reply. unfortunately i did not find to forum the information of rhe questions i sm looking. your help is much appreciated

thanks again

[Guest 2]

Replacing Battery

starting problems, flat battery Audi A6 2.7TDI

Battery Drain Question

Replacement battery maybe?

Battery for Audi A6 2006

Battery Condition

A6 3.0 tdi 2005 power/battery problem

Whats the state of charge of your battery?

Battary Change 2.7 TDI

Some reading.

[control676]

Replacing Battery

starting problems, flat battery Audi A6 2.7TDI

Battery Drain Question

Replacement battery maybe?

Battery for Audi A6 2006

Battery Condition

A6 3.0 tdi 2005 power/battery problem

Whats the state of charge of your battery?

Battary Change 2.7 TDI

Some reading.

hi, the posts are useful and realy thanks. Unforunately what I want to know exactly I did not take it. So could you please reply in my questions? Your help is much appreciated.

regards

[apole]

Hi,

OK what are the symptoms you are noticing, how do you know the battery has low power, and what is happening with the gearbox etc?

I would get a full VCDS code scan as this is the best way to know what is going on with all such systems on the car.

If it is your battery, and it's old and failing, rather than not getting charged properly, then personally I would replace like with like, so a 95AH battery.

If you change it for another type, then you will need to re-code the battery manager, so that it can ensure the battery is properly charged.

To charge the existing battery, you must either disconnect it and charge directly on the terminals, or the recommended way is to connect the charger to the + and - posts provided in the engine bay.

Hope this helps but I would be getting a code scan first.

Andy

[control676]

Hi,

OK what are the symptoms you are noticing, how do you know the battery has low power, and what is happening with the gearbox etc?

I would get a full VCDS code scan as this is the best way to know what is going on with all such systems on the car.

If it is your battery, and it's old and failing, rather than not getting charged properly, then personally I would replace like with like, so a 95AH battery.

If you change it for another type, then you will need to re-code the battery manager, so that it can ensure the battery is properly charged.

To charge the existing battery, you must either disconnect it and charge directly on the terminals, or the recommended way is to connect the charger to the + and - posts provided in the engine bay.

Hope this helps but I would be getting a code scan first.

Andy

thanks for ur reply. how i understand it is that on last start of the car, on ignition i observed that All lights on car switched off (was night) and then back on again. this nefore was not happening. Later on driving was like the car was not normal.

now for the chsrging, if u use the + and - in the front bonnet bay it is sire that there is no any worry to destroy the ecu or somethong? battery must be connected csuse the alarm is activated if u remove it.
thanks

[Guest 2]

Charge from the points in the bonnet. I've removed the battery in my A6 and the alarm didn't go off??

You'd be best just buying from Audi.

[control676]

Charge from the points in the bonnet. I've removed the battery in my A6 and the alarm didn't go off??

You'd be best just buying from Audi.

hi. yes i tried to remove the battery, i removed it and the alarm was activated. and for this reason I put it it back. why the alarm wss ON without bsttery? is there a back up battery?

thanks

[Guest 2]

I assume you're doing this with the doors unlocked? Ie not just opening the boot with the key?

I suggest having another look at the links I posted as they'll help you alot.