RoyC

I have had my A6 s-line Avant for 13 years, never any problems with the leather summer or winter.

Just wait till next mot due in January to see it gets a clean bill of health with no advisories?

STOP, STOP, YOUR KILLING ME.

It looks like a urinal. 🤣

This one any good ? https://www.ebay.co.uk/itm/274034472357?hash=item3fcdba35a5:g:Dw0AAOSw8fddk6-b or this one https://www.ebay.co.uk/itm/255573036135?hash=item3b81570c67:g:zWUAAOSwP6dioHiK

Not an A3 but it may work

harmonic balancer

Check these videos out. https://www.youtube.com/results?search_query=audi+cruise+controle+in+1mph+increments+

I don't know how to do it but it must be possible because my A6 goes up or down in 1mph increments. Look at this

I have been using REDSTUFF low dust pads for years on OEM rotors. The stopping is better than OEM pads and as it claims, low dust.

Few videos here https://www.youtube.com/results?search_query=audi+a4+oil+in+intercooler

https://www.youtube.com/results?search_query=2005+audi+a3+key+wont+turn

Are you running them with the correct tyre pressure ? My tyres are 45 psi front and 40 psi rear.

I usually stick with Mitchelin, Hard wearing, low noise. I never drive hard or in the wet, unless I am caught out.

I am the same. My son works in an accident repair shop and he don't want to do the same thing in his down time.

I have one of these pumps, it takes hours to suck the oil out. You can also get the tube stuck in the dip stick tube and it's a PITA to get it out. You leave a lot more crap in the sump sucking it out rather than draining it out. Garages are paid to change your oil, not to worry about how much of the crud is left in the sump.

Crank sensor

A few videos here https://www.youtube.com/results?search_query=Common+rail+switch+LEAK

Plenty of videos about it. https://www.youtube.com/results?search_query=2014+audi+a5+Notchy+Steering

I only remove two of the plastic screws then swivel it round on the third one to expose the drain plug.

Years ago, after my warranty ran out on my A6 Avant I decided to do my own oil change, What a chor to have to remove the under tray just to change the oil. I decided to do something about it, so I cut an access hole in the under tray. Oil changes are now so easy.

Measure the ones on your car ,then go on ebay.

I don't know about used cooking oil. I used to run my Vauxhall cavalier on new sunflower oil, went ok. Trouble was it used to leave a smell of chips every where I went Hahaha.

Anything but BLACK.