I have had loads of warranty work done over the years on my Ms. My E60 M5 had around £25000 in warranty work, broke the think at least once a month, all on the AUC warranty. No fuss, no drama, take it in, they fix it. Not so sure the process with warranty direct etc would be as seamless or fast. I'll always run the BMW warranty on my Ms, just peace of mind on my part.
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