Carplay now not working since upgrading to iphone 18 pro

I have just upgraded to the iphone 18 pro (poor decision so far). CarPlay was working perfectly but now pixelates when using maps. I have followed all the trouble shooting online but no further forward. I have a Mercedes A-Class 2017. I have the same issue if it’s wired or wireless. I have wiped it both on the phone and car and started again but still same issues. I find lots of things to try but no resolutions. Please help