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C43 Sport + auto mdoe cutting out

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Old 02-06-2018, 05:29 PM
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Mercedes C43
C43 Sport + auto mdoe cutting out

I have a 2017 C43 which when in Sport and Sport + auto mode is redlining between second gear and third gear and then it cuts out on the limiter as if you had hit the redline in manual mode.
Old 02-06-2018, 06:26 PM
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2017 C43 sedan
Is your car stock or tuned? Any power mods or performance exhaust?
Old 02-06-2018, 10:30 PM
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Originally Posted by Trappers
I have a 2017 C43 which when in Sport and Sport + auto mode is redlining between second gear and third gear and then it cuts out on the limiter as if you had hit the redline in manual mode.
sounds like a warranty issue, unless you have had a Tune, then it is a tuner issue. Probably needs a software up date.
Old 02-06-2018, 10:56 PM
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It could be the performance exhaust valve being stuck closed also.. is there any codes ?
Old 02-06-2018, 10:59 PM
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Originally Posted by Gungaslow
It could be the performance exhaust valve being stuck closed also.. is there any codes ?
Curious, why would that cause it to hit the red line limiter?
Old 02-07-2018, 12:41 AM
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c-fo-fiddy
Originally Posted by Gungaslow
It could be the performance exhaust valve being stuck closed also.. is there any codes ?
Your trolling has never been clever but it's not even funny anymore. I mean, PE? Really?
Old 02-07-2018, 07:34 AM
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If I understand the question correctly, I think it's the ASR/ESP which does this? I have the same problem, but never a problem when I turn off the ASR/ESP. With the ESP-system activated the power is reduced sometimes when accelerating hard in Sport+ and shifting from 2nd to 3rd. I see it more often in winter, because of less grip with the winter tyres, but I've also experienced it with summer tyres and dry asphalt.
Old 02-19-2020, 02:32 PM
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Any update on this one?

have the same thing ?
Old 02-21-2020, 05:36 PM
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Originally Posted by Trappers
I have a 2017 C43 which when in Sport and Sport + auto mode is redlining between second gear and third gear and then it cuts out on the limiter as if you had hit the redline in manual mode.
Possibly it's a transmission issue. Either the transmission is reaching a torque limit, or it's too cold (not up to operating temp yet) causing a lag in shifting... hitting redline/rev-limiter before it's able to shift.

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