Audi A6 (2004 - 2009) - 2004 3.0tdi Electrical Gremlins

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Sat 6 Dec 2008 08:42
2004 3.0tdi Electrical Gremlins - singhl
I have a 2004 (newer shape) A6 3.0 tdi SE Quattro. A few days ago it showed "battery level low" in the tv screen, looked at the graph and it was at about 5%, but the car started fine, the level has not moved it 3 days, the car is driven 150+ miles a day (mostly motorway). The battery voltage looks ok, and seems to be charging.

Also I have noticed that my keyless opening of doors does not work when I come to the car first thing in the morning (but will work after 20 mins of driving), the same goes for the interior lights, won't work on entry to the car, but fine after 20 mins of driving.

Is this the comfort module and damp/wet issue, if it is where is it located on my car?

Any help appreciated.

{typo in header corrected}

Edited by Dynamic Dave on 07/12/2008 at 19:26

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Sat 6 Dec 2008 09:20
2004 3.0tdi A6 Eclectrical Gremlins - Altea Ego
change the battery.
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Sat 6 Dec 2008 11:44
2004 3.0tdi A6 Eclectrical Gremlins - 659FBE
Fair advice, but I'd test it first.

If you do change the battery, connect a slave battery to one of the power sockets in the boot unless you want grief resetting everything.

659.
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Sat 6 Dec 2008 18:12
2004 3.0tdi A6 Eclectrical Gremlins - singhl
The voltage across the battery is fine 12.6v when car is not started, does anyone know where the central locking unit or covenience uniot for this car is located
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Sun 7 Dec 2008 14:36
2004 3.0tdi A6 Eclectrical Gremlins - dieselnut
I think the A6 is the same as a Passat, in which case the Convenience ECU will be located under the front passenger carpet & foam underlay. Just right for collecting the water from a poor fitting pollen filter or blocked plunnum drains. Do a forum search & spend the rest of the day reading everything about those problems.
Although you have 12.6v which is fine, that will drop quite a bit when you start the car on a cold frosty morning.
Yours just sounds like the display computer is trying to tell you that the battery is near the end of its life, which with low temperatures as of late is the last thing you need.
Its probably the original battery & 4 years old now so you've had your moneys worth.
Take the car to a local battery factors who will check your existing battery under load & no doubt have a new replacement in stock to change at a reasonable price if nescessary.
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