Ok, these are error codes for the immobilizer and start/stop control systems. This may be an error registered for the key, the antenna ring, start/stop control module or immobilizer control module.
Unfortunately this absolutely REQUIRES a Mercedes STAR scan tool in order to diagnose.
While it is still starting fine, at some point if not diagnosed and corrected, it will leave you stranded with a no start condition.
Most of the time it is the immobilizer control module, but being that this is quite expensive, I would have it properly diagnosed before replacing.
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