What's the switch on back of cluster for?

[bluequattro]

Just change temp gauge on 90 clusters
@ the back there is a sliding switch marked 1-6 and days diesel benzin above it
Of course I played with the switch without checking what number it was on!
Which number for a 7a it does it make no difference?
Ta

[UrS4boy]

Just change temp gauge on 90 clusters
@ the back there is a sliding switch marked 1-6 and days diesel benzin above it
Of course I played with the switch without checking what number it was on!
Which number for a 7a it does it make no difference? Ta

Depends which switches you are talking about. I know the C4 UrS4s had two sets, one for the country/language and fuel type (petrol or diesel) and on set for the adjustment of the trip computer fuel computer.

More detail info here: http://forums.quattroworld.com/s4s6/msgs/168633.phtml

[JP]

Does that mean we can adjust mpg ratio using the dash? So when we fit larger injectors we can adjust it and correct it or is it not a potentiometer

[bluequattro]

I selected 5, is that right?

[UrS4boy]

I selected 5, is that right?

Sure. If you have a diesel in the US of A.

From the link I provided above that you apparently missed:

Switch.......Country/Fuel
Position

...1......German speaking countries/gasoline
...2......USA/gasoline
...3......All other countries including Canada/gasoline
...4......German speaking countries/diesel
...5......USA/diesel (Which is funny since no US C4 diesels)
...6......All other countries including Canada/diesels

[Error404]

Does that mean we can adjust mpg ratio using the dash? So when we fit larger injectors we can adjust it and correct it or is it not a potentiometer

Yup you can adjust the mpg reading +/- 15% using the jumpers, probably not much use for your engine though mate

[JP]

Lol 15% is useless indeed, shame.......

[UrS4boy]

Yup you can adjust the mpg reading +/- 15% using the jumpers

Like this:

[JP]

Looking at that diagram does that not mean if you switched all to on you'd get a collective percentage gain of 3x 5, 3x 10, 3x 15 making +/-90%?

[UrS4boy]

No. Each is a representation of where the three switches need to be to affect a certain (5, 10, 15) percent change. It isn't a multiplicative thing. +/- 15% max.

[Zoig]

JP, On UrS6 AIFAK you dont have the dip switches anymore but you have to calibrate that via Vag-Com. I'm not sure if the +/-15% limit still applies or is it bigger.