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D3 - Interior Electrics Airbags, Sensors, climate modules, instrument clusters, switches etc

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Old 12th April 2018, 11:58 AM
ulfilias ulfilias is offline
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Join Date: Apr 2009
Location: Peterborough, Cambs, UK
Posts: 860
Default Console Button Lights

Hi There,

A while back at work i left my sunroof open and didn't realise the rain until too late. It wasn't a massive amount of water and i dried everything off and it was reasonable if a stupid move

Anyway after that the red back lights in the center console have been iffy. Sometimes pressing would get them on, sometimes they'd work and now they've just given up the ghost. It's not a major hassle and i know where the CD or NAV button is by now, but occasionally they'd be useful, so am thinking of finally looking at the issue!!!

Any pointers as it's a bit i've not removed on the D3 etc
Current :
2005 A8 Sport 4.2 V8 D3 - LPG mostly working!

Previous :
1998 S8 PF 4.2 V8 D2 - Gearbox died ~120k
2002 S8 FL 4.2 40v V8 D2 Prins LPG - Engine valves met pistons ~230K

Also :
1996 Jeep Grand Cherokee 4.0l (not worth selling!)
2003 Brabus Smart FourTwo (for sale)
2003 Mazda Rx8 2.3 (should sell)
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Old 12th April 2018, 01:03 PM
snapdragon's Avatar
snapdragon snapdragon is offline
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Join Date: Nov 2011
Location: UK
Posts: 1,563

You have to buy some 99% isopropyl such as from cpc farnell and then take out the PCB and flush it to remove the water.

As far as I remember, remove the ashtray, remove some screws, remove the something else and maybe 2 more screws under that hold the centre console in then it lifts out.
There are about 5 plugs to take out, remove them and then take in the house. Remove the back plastic, EPB switch and maybe start button (check this instructions in SSP as there is a trick with a sliding pin) and then wash the PCB in the sink and leave until dry about 15 mins and then put all back together. You might be able to do this without removing the PCB via the gaps, but I would worry about the isopropyl affecting the soft touch coating on the MMI buttons, it seems to go soft when damp.

The isopropy is very miscible in water and not conductive so will displace the moisture in all the nooks and crannies and microswitches and will dry off quite quickly due to it's volatility.
A8L 3.0TDi SE Quattro 2006
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