I'd change the sensor anyway if you haven't already as the car could just be masking the problem in your case.
I'd advise changing the sensor anyway. As it could lead to a big bill otherwise. Bet safe than sorry in my opinion.
Wipers won't work if the car thinks the bonnet is up. Common on the mk5 golf (electrically same as A3) and it's the bonnet switch on the catch that packs up the best way to test it is to disconnect it at the plug near the top of the rad area left hand side as you look at it with that disconnected it puts then into failsafe then you can use them hope that helps.
Alternatively the workers in the back of the fusebox in the engine bay can become loose too.
Welcome to the forum you'll find the members on here are a friendly and helpful bunch 🙂 I do love an E39. The best 5 series in my opinion. My mates dad had one with the full ac Schnitzer bodykit and wheels. Stunning motor it was.
Glad its all resolved 🤞 let's hope it stays that way!
My A6 is sentimental so I consider the cost worth it. When I get it done I'm going to get a specialist to do it and move it from off the floor to another location to protect it.
This video should help:
And here's an example of what you need:
https://www.halfords.com/technology/car-audio/stereo-fittings/audi-installation-kit-ctkau01-577715.html?istCompanyId=b8708c57-7a02-4cf6-b2c0-dc36b54a327e&istFeedId=367c5610-f937-4c81-8609-f84582324cd6&istItemId=wirxtppmt&istBid=t&_$ja=tsid:|cid:16710940973|agid:|tid:|crid:|nw:x|rnd:5504221901323466582|dvc:m|adp:|mt:|loc:1006867&gclid=Cj0KCQjwpv2TBhDoARIsALBnVnnhiVPfUOld-jAQbCCwdHmYtec2tlp7b7_fnyREVO_7paGhFpdQ-yYaAn7_EALw_wcB
Apologies I'd mis read that. The finance company is still the best bet then if bought on finance.
I think the warranty will depend on the dealer franchise won't it?
Another option is to contact the motoring ombudsman.
I too am looking for older style wheels. But my A6 is older than your Audi. The two sets I'm looking at are £500 and that's for 20 year old refurbed wheels. In my case I'm just looking for some different wheels for shows only.
You've done quite a good amount of work so far. I'd have said MAF sensor so it's good that's coming. I'd recommend a diagnostic check once the MAF is fitted. Could it be a lambda sensor I wonder?
Sorry my bad, I misread it. I do t think the column needs coding. I'd still advise a diagnostic check.
As you disconnected the battery is it worth seeing if the battery is failing due to age. Failing batteries can often throw up unusual faults.