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M112K clutchless pulley causing torque cut – tune file advice?

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Old Feb 8, 2026 | 08:40 PM
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Christos's Avatar
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Default M112K clutchless pulley causing torque cut – tune file advice?

Hi all,



I’m working on an M112K car (same drivetrain as the SRT-6 / C32 / SLK32).



I’m running a stock 72 mm pulley, but converted to clutchless, and the ECU now cuts power under load (throttle/torque intervention).



I’m not chasing power — just trying to make it daily drivable again.



I’m hoping to confirm:

• whether a basic Stage 1 tune resolves this

• if there are known tuners/files that already support a clutchless setup

• whether flashing is OBD or bench on these ECUs



Any input from SRT-6 owners who’ve dealt with this would be appreciated.
 
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Old Feb 9, 2026 | 09:04 AM
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zip439's Avatar
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Joined: Jul 2010
Posts: 2,266
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From: SE Alabama
Default Re: M112K clutchless pulley causing torque cut – tune file advice?

Just a thought, but on the SRT6 the ECU cuts power when the intercooler pump is weak or malfunctions. We have all upgraded to the newer Bosch pump.
You should contact Rob at Needswings or Josh at the Mercedes swap shop with your other questions.
 
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Old Feb 10, 2026 | 11:50 AM
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GannyX's Avatar
Joined: Jan 2017
Posts: 165
Likes: 27
From: Maiden, NC
Default Re: M112K clutchless pulley causing torque cut – tune file advice?

I’m hoping to confirm:

• whether a basic Stage 1 tune resolves this
yes if your are clutchless you need a tune


• if there are known tuners/files that already support a clutchless setup
Yes


• whether flashing is OBD or bench on these ECUs

both, all of this can be done at The Mercedes Swap Shop
 
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