M coupe only avaliable with stick shift in Uk so probably okay there manuals no probs towing

Alternator died on my beemer and it took all the charge from the battery as something had gone to earth

Or your battery has got a dead cell and when the alternator dropped below charge level then the electrics crapped out
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P.Allison fixer of big engines Mk2+Mk2a signed by God / Hacked by the Lord Aberdeen Scotland