Emauss

I have the stock 255/45 18s on my '06 A8L. The factory recommended pressure is 33 all around. When I picked the car up from the dealer, it had 43psi in 4 tires and 33 in the spare. When I called the dealer, the salesman said to reset the reader. Same results. The service manager said it was intentionally higher than the 33. That is the lowest possible pressure and I should use 35 frt and 39 rear.

I have never experienced a service manager recommending totally different settings than the factory.

Is he just covering up for a wrong setting initially or ??????

(e)

TheBrit

I never get my tyres pumped up correctly at the dealer, even when I remind them when booking in and when dropping the car off for service. I bought a cheap 12v 'digital' (stops automatically at set pressure) compressor and I just adjust my own after picking it up.

Not something you should have to do, but techs obviously can't read the info panel on the fuel filler flap.

Jason1st

and they wear perfectly.

greenie

The tires are wearing well.

D3AeighT

One pound less...39 lbs all around...I have 19" r's.

rexwilson

on a related note, my tire pressure settings are often strangely identical from wheel to wheel: each one will show exactly 33.3, or something similar. I suspect the TMPS is simply rounding or approximating, as it seems somewhat unlikely that every tire will have exactly the same pressure, down to the tenth of a PSI.
If it approximates, then why does it bother with the tenth of a PSI decimal place?

Plano-4.2

It doesn't appear to be accurate to the tenth of a psi. You'll never see a 33.4 reading.

I'm not near my car to see what the metric units are (someone else?), but I suspect that the TPMS reads in values accurate to the ones digit, then for english, just does a simple conversion rounded to the tenth of a psi.

derfA8L

...At least relatively safe, up till now anyway.

TheBrit

Metric is expressed in bar.

koolaid

There's two different ratings on that sticker for each tire/wheel size! Which one would you like?