Took my car in for a free safety check thing at a local garage today. It got an advisory for slight wear on the N/S front lower wishbone bush, which I suspect is the cause of the creaking I get over slightly uneven surfaces and when I push down on the car (from all corners). I also got an urgent warning about my coolant being discoloured.. I'm not sure what it's supposed to look like, but it's an orangey colour.. Anyway, I'll buy some new coolant and replace it, might as well do the thermostat while I'm at it.. Am I right in thinking that I need some G12++ coolant? Can I just buy some from my local Audi dealer or is there somewhere cheaper I can get it from? Are there any variants or will it just be the one type of coolant they are selling? Sorry about all the questions, I'd be grateful for any help.