A battery...
I needed to replace the battery in the M5 so I tested the M coupe's and it was only cranking at 330 amps. New one installed last weekend. FYI, lots of good choices; I went with an Autozone Duralast Platinum AGM H6 battery.
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2020 F87 M2C Hockenheim Silver/MT
2002 E39 M5 Sterling Gray/Caramel
2007 E86 Z4M Coupe Silver Gray/Black
2021 Kia Telluride (hauler)
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