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Ambitious idea transmission upgrade

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Old Dec 31, 2024 | 03:28 PM
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Ambitious idea transmission upgrade

I have a c200 kompressor that I have an ambitious idea and want to know wht ppl if possible.
has anyone try to upgrade the 5 speed auto transmission to something more efficient like a 7 speed?
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Old Dec 31, 2024 | 07:04 PM
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2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
You might be able to REPLACE the 5G with a 7G, but I've not heard of it. You should look at this thread:

https://www.benzworld.org/threads/tr...to-5g.3047146/

Or you may want to replace the conductor plate and valve body with one from Victory Road Performance.

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Old Jan 3, 2025 | 03:09 PM
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Maybe doable, but lots of electronic issues. The 7G has sensor outputs that the 5G doesn’t have, so maybe needing new ME software, seeing if the existing ECU can handle it, maybe even new wiring harness, and maybe new compatible instrument cluster to display gears 6-7. Need to get those issues sorted out before moving forward.

Last edited by Odd Piggy; Jan 3, 2025 at 03:15 PM.
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Old Jan 4, 2025 | 04:50 AM
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C200 w204
With all the possible incompatibility issues between the 7G gearbox and all the other ECUs/Nodes in the car I say you'd be better off to buy a new car with the 7G+ gearbox.

I mean lets be honest . . . . what could possibly go wrong!

(Unless you're doing ALL the work yourself and working on Murphys Law with the possibility of everything that can go wrong doing so, with your love of gambling and are a true sadist.)


P.S. I'm not a pessimist . . . . . I'm a realist.

Last edited by bazzbazz; Jan 4, 2025 at 04:51 AM.
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Old Jan 4, 2025 | 09:14 AM
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I love how newbies ask a question and then never come back to discuss the answer.
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Old Jan 4, 2025 | 10:58 AM
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Originally Posted by JettaRed
I love how newbies ask a question and then never come back to discuss the answer.
Happens... guess life moves on, or someone have the same idea and resurrect the thread down the road : )
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Old Feb 27, 2026 | 01:10 PM
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I have K32 (Active Lane Change Assist). It works -- but I almost always forget to use it. Guess this is the result of driving 50 years the old-fashioned way
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Old Mar 1, 2026 | 07:01 AM
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No - That's lane-keeping assist.

@J_Boxer, on a different thread, posted this good description of K32.
K32 (Active Lane Change Assist): This is the standard "tap-to-pass" system that most of us with the Driver Assistance Package (DAP) have. It is Driver-Initiated. You tap the stalk, the car checks, the car moves. It will not move back on its own.

https://mbworld.org/forums/eqs/92081...hange-k46.html
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Old Mar 2, 2026 | 12:01 PM
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I dug around a bit to see if anyone has actually tried this 5-speed to 7-speed swap on a C200 Kompressor. Short answer; I couldn't find a single person who has done it. Looks like you might be venturing into uncharted territory here and I would love to know how it goes.....All the very best
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