Brake HOLD issues

Old Aug 21, 2025 | 06:14 PM
  #1  
///Bruce's Avatar
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Brake HOLD issues

My daily driver is my Macan Turbo. Occasionally I drive the GTC. Yesterday I used it twice and had something weird happened. It started to shudder and get jerky when I hit the gas.

Anyone else have this issue?
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Old Aug 21, 2025 | 07:09 PM
  #2  
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AMG GTC
I've only had my car a few months and I think that's happened to me once or twice as I slowed, but then just went away. I'm not really worried about it.
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Old Aug 21, 2025 | 07:49 PM
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What does this have to do with Brake HOLD in your title? Sounds like misfires. Read out the codes and see if one or more cylinders misfired. May not have been enough to get a CEL, but the misfires are still getting logged. Bad coils is a known issue with the M177/178. AMG extended their warranty. Could also be bad fuel.
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Old Aug 21, 2025 | 09:11 PM
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Originally Posted by superswiss
What does this have to do with Brake HOLD in your title? Sounds like misfires. Read out the codes and see if one or more cylinders misfired. May not have been enough to get a CEL, but the misfires are still getting logged. Bad coils is a known issue with the M177/178. AMG extended their warranty. Could also be bad fuel.
Shell gas. No alarms/alerts on the dash. It has never happened before until I used the Hold function. Twice in a row.
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Old Aug 21, 2025 | 11:58 PM
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Originally Posted by ///Bruce
Shell gas. No alarms/alerts on the dash. It has never happened before until I used the Hold function. Twice in a row.
Get a diagnostic tool and read out the codes through the OBDII port. Without it, it's anybody's guess.
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