are they interchangable?

 

dash, yes.

Gauges, no- not without wiring changes

 

gauges? well i found this premo dash and the guy said i can have it if i take it out of his car. i have 2 sets of s4 gauges, so my s4 gauges will bolt up right?

 

just curious, is the headlight switch, the turn signal switch, etc, etc (switches and buttons) the same in the s4 and s5?

 

no, the turn signals, and cruise switches are different. The turn signal switch is even wired different. You will need the correct light harness for which style switch and gauge surround you use.

Internally however, the headlight and wiper switches are also different, but interchangeable with either series.

Gauges, you will need to decide which ones you want to use, again based on the dash and gauge harness. They mount the same but are wired different.

If you keep your stock S4 wiring and use S4 Electronics you should be fine.

 

10-4

 

so is there a way to use the s5 gauges in a s4 dash? i favor the round than quarter circle