2020 W205 c63s limp mode
Thread Starter
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Joined: Mar 2023
Posts: 31
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2020 C63s coupe
2020 W205 c63s limp mode
This probably has been posted here before but...
I got a muffler delete (yes PE) wanted more noise, shop connected the valves back to the modules and zipped tied them away. I'm assuming what happened was turning exhausts off and on kept spinning the valves and they got stuck and threw some sort of error code.
Then later I got AWE valve simulators and plugged them in and still no help.
Anyone found a fix around this?
I guess I could either reinstall my muffler and valves with their modules.
OR do I have to take it to mercedes dealership to remove the errors being thrown?
I got a muffler delete (yes PE) wanted more noise, shop connected the valves back to the modules and zipped tied them away. I'm assuming what happened was turning exhausts off and on kept spinning the valves and they got stuck and threw some sort of error code.
Then later I got AWE valve simulators and plugged them in and still no help.
Anyone found a fix around this?
I guess I could either reinstall my muffler and valves with their modules.
OR do I have to take it to mercedes dealership to remove the errors being thrown?
Thread Starter
Junior Member
Joined: Mar 2023
Posts: 31
Likes: 1
2020 C63s coupe
Thread Starter
Junior Member
Joined: Mar 2023
Posts: 31
Likes: 1
2020 C63s coupe
https://streamable.com/lt38z1
Here is a video url attached above and video attached to this post.
Someone take a loot, this **** aint right
Here is a video url attached above and video attached to this post.
Someone take a loot, this **** aint right
Thread Starter
Junior Member
Joined: Mar 2023
Posts: 31
Likes: 1
2020 C63s coupe
I didn't disconnect it no, but when I did my valve simulators I pout the keys in my house and did it like a mile away, then later disconnected and replugged my batter. That didn't fix it. I took it to my mechanic and he scanned for codes and found no codes.
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gt63s
Gt63s Same issue
Hey im experiencing literally the same exact thing but with my 2020 Gt63s. Cut mufflers off and the valves went with them, tried tieing up the motors but car went limp with the boost limiting after 3500rpm. No CEL. Got AWE valve simulator plugs but also didnt work. I didnt do anything with my battery etc though.
When you got your Renntech valve controller module your motors were still unplugged with AWE? Or back zip tied up and plugged into OEM harness?
My metal bracket they were connected to obviously got cut out with the muffler so the springs in the motors arent in anymore. Were yours in? Been trying to fix this issue desperately for the last week. Let me know please. Thank you!
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Joined: Aug 2019
Posts: 82
Likes: 17
From: Florida
W140 S320
Hey im experiencing literally the same exact thing but with my 2020 Gt63s. Cut mufflers off and the valves went with them, tried tieing up the motors but car went limp with the boost limiting after 3500rpm. No CEL. Got AWE valve simulator plugs but also didnt work. I didnt do anything with my battery etc though.
When you got your Renntech valve controller module your motors were still unplugged with AWE? Or back zip tied up and plugged into OEM harness?
My metal bracket they were connected to obviously got cut out with the muffler so the springs in the motors arent in anymore. Were yours in? Been trying to fix this issue desperately for the last week. Let me know please. Thank you!
When you got your Renntech valve controller module your motors were still unplugged with AWE? Or back zip tied up and plugged into OEM harness?
My metal bracket they were connected to obviously got cut out with the muffler so the springs in the motors arent in anymore. Were yours in? Been trying to fix this issue desperately for the last week. Let me know please. Thank you!
Newbie
Joined: Jul 2025
Posts: 8
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gt63s
