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02-28-2020, 05:42 PM
Thanks Terry. After several tries with your suggestions above. The firmware write to the JB4 was successful. The car started right up. Is there a reason the C63 JB4 wont clear codes and quench the CEL? That wasn't an issue on my N55.
2003 E39 M5 - Sold
2013 335i MSport - Sold
2018 C63s AMG - Sold
2021 M550i
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