Just did my air and diesel filter yesterday. Air filter looked as bad as yours. Car has 170k miles and no mention of diesel filter in the service history. Got both filters from audi with trade discount for €110. The diesel filter i cut open afterwards and out spewed some very dirty gunge. The paper filter inside was covered in a slimy gloopy sludge aswell.

I had a slight shudder throughout the car at low revs, most noticable at 70-80mph even on glass like roads, I was convinced there was a gearbox issue and was lining up a fluid change. The shudder is gone after the filter changes so i guess it was partailly blocked and starved of fuel at low revs.

A lesson to start simple!

Hey that's interesting. I have a very slight shudder between 50-60 mph. I've had the wheels balanced/checked and a 4 wheel alignment (checked, and it was fine) and replaced all four tyres, still there, very slightly, and bugs the s@*t out of me.

How easy was the diesel filter to replace?

Didn't see a date on it. I still have it (in the wheely bin) if anyone knows where to look for a date exactly.

Good read

It seriously bugged me too. I only had the car a few weeks and put the shudder down to mixed brands and thread depth on the tyres. I got 4 new dunlops and alignment and balanced twice. Still had the shudder. I felt it most in the accelerator pedal and a little in the gearstick and the passanger seat back would vibrate. Basically ruined the comfort for me anyway.

The diesel filter is easy. Fill the new one with diesel, slap it in, few cranks and it will start again. You could even fill the new filter with a fuel system cleaner like dipethane or stanadyne to give the injectors a good blast.

My shudder is gone, much more responsive too. Im thinking it was the original filter in the car after 170k miles:rolleyes:

Take a picture of the top with the black writing and post it on here, not all have a date but a lot do, if you look on the top of the man filter it's on there :) since the design is the same I'd be surprised they aren't the same manufacturer.

Ta da:


http://i366.photobucket.com/albums/o...651D125F71.jpg

It's not there, sorry for making you drag it out the bin, if you look on this photo next to made in Germany is the date stamp, funny why they don't put it on the Audi part :\

http://i180.photobucket.com/albums/x...ADF9119397.jpg

No worries. Didn't think it was there. Ta

Just checked the car's service history. Audi says the air filter was last changed at 86k miles, about 2 years/20k miles ago.

My service history was like that, variable servicing iirc, 20k miles is a bit excessive in my eyes regardless if the oil has gotten a lot better over the years, iv now changed the dash to 10k fix servicing intervals, might explain the state of the filter though.