As I pulled onto my street the red "check coolant level" warning came on in center cluster.
Slowed down and coasted home. Temperature gauge didn't budge and was normal throughout. Just before pulling into driveway, red warning message shut off.
Looked under car and can see coolant drip, drip, drip, dripping. Just a drip but pretty constant coming off the backside of the plastic rear undertray. Left a snail trail on the driveway.
Now the part that's so infuriating about this is, it's another in a long line of the excellence in German engineering myths. Why? Because I think I know what the issue is because it was also an issue in my 996! So I'm hoping it's the same thing.
What is it? The coolant cap on the cooling expansion tank fails. Regularly. FFS...how hard is it to make a coolant cap that doesn't fail? Obviously pretty hard for the Germans as they're on the 4th revision of this particular cap. I'm almost certain that when I check the cap it will be revision 1. They fail with enough frequency that guys replace them as regular maintenance every couple of years.
These types of things make my head explode. A coolant cap...SERIOUSLY?
Will keep you posted.
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