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High rev during warm start after control unit update

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Old Jun 23, 2022 | 06:10 PM
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2017c43Dan
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2017 c43
High rev during warm start after control unit update
2017 c43
Mercedes dealer provided an update for the power control unit today. The car now revs high during a warm start like it does on a cold start. The exhaust also seems a bit louder even with the performance exhaust option. Anyone else experience this?
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Old Jun 23, 2022 | 08:04 PM
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Originally Posted by 2017c43Dan
2017 c43
Mercedes dealer provided an update for the power control unit today. The car now revs high during a warm start like it does on a cold start. The exhaust also seems a bit louder even with the performance exhaust option. Anyone else experience this?
Yes, the update does change that behaviour. It is normal. If you don't believe me, here is a discussion solely on this topic https://mbworld.org/forums/c450-c43-...r-updates.html
I experience the same too when I got my 2017 C 43 in for an update back in 2019, nothing to worry about as intended behaviour at least for the new update.
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