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A My A6 c7 has came up on the dash to add 1 litre of oil. I added 1 litre and then came up again 1 week later, done the same again. Eventually I got the mechanic to check it out. Couldn't see anything wrong , no oil leaking , replaced the engine oil sensor, 5 litres taken out and 7 added. Three weeks later same thing happened again. Dip stick added and the levels are okay. Anyone else experience this or similar? Thanks

There's usually a stop start button to switch the system off, or a light in the instrument panel.

I just wanted another opinion on what I already knew , thanks for your imput

Please keep us posted on how you get on

I dont believe so. It could affect the emissions but not enough to fail an MOT I believe.

Rear parking sensors fitted too!

Are there any mechanical consequences when you disable the ad blue from the ecu

Publish your clip to YouTube then link it back here. Loud turbo, not sure. Granted, it will kick in around 1,500 rpm, but if it was noisy such as over-boost, I’d expect it to go into limp mode. If car is scanned with VCDS that should rule that out. Brakes, sticky caliper can make a noise, but disc would heat up and you’d smell burning. Stone behind disc and brake shield? Discs heating up then you’ll see heat spots. To rule out, drive for 10-15 minutes and coast to a stop. Discs should be warm, but definitely not hot. When auxilliary serpentine drive belt was changed, no issues with job, no bearings on way out? No loss of coolant or other indicators?

Thanks for the reply back, Spartacus. Appreciate the clip may not show much but thought it may add a bit of context - weird its not viewable? I'll try again just in case. And yeah I agree it sounds like a wheel bearing. I'm not an expert by any means on these things but I'll put it to my mechanic and they'll give it a once over. Will tell them to raise the front end like you said, to check lateral movements. Anything else you think it could be? The car runs really well otherwise and its been in good nick since its recent major services I mentioned. 20260702_121029.mp4

so in general,the water isn’t coming out of sunroof,it’s coming from that sound barrier? I can’t open any file/video on this page. Can someone reach out to me,my email is [email protected] with the video and pdf file of bulletin how to fix it. Thank you!

Hi my keyfob won't work so changed battery and still the same so I use door key which activated my alarm and it wouldn't start I put keys in the right place to connect but kept saying key not detected Its a a5 40tfsi 2022plate

Your video doesn’t play. Invariably these clips don’t add anything to pinpoint the source issue. If you’ve had car 8 years, then you know service history. Suspect it could be a wheel bearing. You tend to hear them between 40-50mph. If you’re hearing it from 20mph it must be particularly bad. Couple of ways to pinpoint them. Car raised at front, both sides. Hold wheel at 10-to-2 position and try lateral movement. Then try at 12-to-6 position. Any movement should be obvious. That can still be difficult to confirm, so other way is to remove brake caliper and feel the hub rotation. Cars with Quattro drive are always hard to pinpoint. Luckily it’s a hub unit. Four triple-square bolts hold it on. You’ll need to remove through hub bolt too, and replace. Bad news is these bearing hubs can seize on, so air hammer is your friend for these jobs, plus flap wheel to clean any oxide corrosion. Use a smear of ceramic grease on new bolts. Parts wise, F.A.G. units every time. Pretty sure that will be OEM. Always fit in pairs.

Thanks for the advice, ill have a shop around and see what decent wheels I can find 👍

Hi guys New to the Audi forum, even though I've had my car for about 8 years. Had a lot of work done on it lately, including crank pulley, drive belt, water pump, coolant valve, etc. Car is in otherwise good working order and has clocked up 108k miles. Last few days, I've noticed that when I accelerate (and ONLY when I accelerate), car is making an audible sound when I go past 20mph. Its not going into limp mode. It still pulls well and the revs go up as they should. The more I accelerate, the more this noise gets louder. The clutch doesn't feel too spongey or too firm. At a push, the accelerator pedal may be giving off a very subtle vibration - nothing major. The best way I can describe the sound is like that of a sporty car with a loud exhaust when it is being driven fast. Like a loud whining sound? I have attached a clip that will hopefully be able to help. My possible thoughts are either something to do with the turbo or the wheel bearing. Many thanks in advance for anyone that recognises the issue!20260702_121029.mp48

The greater the offset, the more the rim is moved away from the hub, so you need more offset to clear the leg.

Count yourself lucky its not the V10. The V8 is generally reliable, however you're buying a 2016-2018 supercar, so it's been around. History is everything. If there's more paperwork than a Brexit export, then you're on the right lines. If the tyres are on the legal limit and brakes need a refresh, then be aware it will be expensive and more importantly question why? Simply saying RS6 seems to add £2k to everything. I'd want the car scanned first off with VCDS to see if there's any historical DTC errors logged. This is a performance car so oil changes every 5-8k miles. In terms of issues. Air intake valves can carbon up. You could treat it to a walnut blast. It's sensor heavy, so if original battery, factor in replacement. It needs coded to car and vented. If panoramic roof, check drain holes. Run mild detergent down them (exit above hinge on front door) and behind rear wheel arch liner. VAG have specific grease for sunroof. Also clean rubber seals. Assuming LED headlights. Potentially LED matrix if later car. Then check operation. Dipping light adjustment on start up is normal, but any further sporadic movent underway points to damaged or siezed height adjustment sensors. Servicing, diffs could use gear oil change. Depends on mileage. It's a ZF 6-speed transmission, but there will be a filter kit, so unless evidence of having it done, factor in. Cooling, apparently this thing has multiple radiators, fans and oil coolers. All are prone to wear and tear. If the car was remapped, be very wary.

Just wondering which gearbox service kit members recommend for the zf 6 speed auto box on the 3.0 tdi (240bhp) A6 C6 Allroad? Thanks

When you say greater offset do you mean less? My originals i have on are 15s but they look lost in the wheel arches, ive looked at numerous pics of c4s with what ranges from 17s to 19s. Like you say I dont really want to go down the spacer route and with them being on the front aswell.

Good evening gentlemen, upon replacing my pcv I have taken my car down the motorway and a large amount of blue smoke came from the back when overtaking, I had continued for another 3 miles and pulled over and there was some smoke coming from exhaust, I turned car off for about 10 mins and drove the 15 miles home and not a single bit of smoke, gave it proper acceleration all the way through 3rd and 4th to about 110mph and nothing so belive this has fixed my issue

Hi guys, I have a 2008 audi a5 coupe 3.0 tdi on about 138k miles, the ac was blowing ice cold on 1 side and slightly warmer on the other, it was like this for a couple weeks but then eventually stopped blowing cold at all so I thought it was just a case of getting it regassed, I took it to 2 different places to get it regassed but both said that no matter what they couldn't get the compressor to engage/kick in.. they said it could be a sensor, a switch or the compressor itself.. so I've now taken it to a 3rd place for a diagnosis and they said they think it's the compressor but to test the compressor they have to basically get to a point where they start taking it off to get to the plug so I might aswell just replace it while they're at it since they think that's the problem anyway.. what do u guys think? I've scanned the car using obdeleven and got the car scanned by them and it's got no codes at all

Yes u are right, cleaned it off and inspected it properly and its pointing towards front crankshaft seal. I keep getting a persistent P0341 error for camshaft sensor, which I’ve replaced but still appears. Im thinking it could be related. Once again thank you for your input 🙏

Tyres that rub on the suspension leg will certainly cause problems, to put it mildly. While spacers might solve the problem they are bodge. You would do better to buy wheels with a greater offset.

Hi, im after some advice/help? I purchased a set of oem audi wheels, there 17s ET45. I went to have them fitted yesterday, the rear looks perfect but the front the tyres sit on the suspension leg. Ive searched and asked questions, im told 10mm spacers on the front will sort the problem but im a little concerned overtime it could cause problems? All the pics ive searched/seen the c4s range from 17s to 19s all round Thank you 🙂

Gauze missing from cam-bridge...... Removed pcv, hpfp, vacuum pump and of course the cam-bridge and valve parts. Had the inlet manifold off to fit another seal so been check there also (I know not likely) Any rare sightings welcomed 🤔

Into the garage on Monday