Intermittent trouble lights – 2006 R52 S 6 speed manual
 

Here’s the problem, sometimes when I drive a short distance the tire light and the DSC light will come on. Everything drives fine except for the lights and the most annoying thing is that sometimes the cruise control won’t stay on.
On a very rare occasion the temp gauge would go completely nuts. I recently replaced the thermostat and the cooling water reservoir to fix that.

So what I do to handle the trouble light problems is to turn the car off and back on again. Sometime this doesn’t handle it and other times it stays good for hundreds of miles of driving. Then it might randomly come back. Lately it came back and restarting it isn’t clearing it.
I'll clear all the trouble codes and it will be good for a short time but it's annoying.

I suspect it’s dirt, water or corrosion in some wiring harness connector BUT I don’t know where these are.
I was just hoping someone could tell me where to look.

Simple as that unless there is some other recommended fix.

Thanks.