GTR front active aero retrofit on GTC

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Old Jan 28, 2021 | 05:56 PM
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GTR front active aero retrofit on GTC

About to install the GTR front carbon active aero retrofit on my GTC.

All the mounting holes are the same , same exact dimensions than the gtc/gts front under cover.I am trying to Identify the 12v Power wire in order to "operate" the active aero , please look at the pictures

















Last edited by mbjj57; Jan 28, 2021 at 09:46 PM.
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Old Jan 29, 2021 | 12:20 AM
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This is awesome
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Old Jan 29, 2021 | 12:38 AM
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I am assuming:

- the two brown and red wires are the 12v power wires..? ( so the active aero goes up and down)
- the black wires are the ground..?
- blue wire ... in cabin " aero" switch.,?
- no clue about the other wires ( might be related to speed sensor since the active aero is supposed to goes up and down with certain speed, the same way the active rear wing works on the gt's models...

Please give your input regarding the wires color and their function ...







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Old Jan 30, 2021 | 01:53 PM
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Nice! Would be also intrested! What did you pay for the active aero unit?

Last edited by xxxPaulxxx; Jan 30, 2021 at 04:50 PM.
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Old Jan 30, 2021 | 06:41 PM
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Are you triggering the open and close with the rear active aero set up? The tray is supposed to be the equivalent downforce to a 4" front splitter...
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Old Jan 30, 2021 | 06:58 PM
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OK. My two cents on your wiring question. I dont believe the triggers are as simple as you are thinking. The decision to open the aero or not is all Computer driven. There isnt a simple speed sensor wire or anything like that. At least not that I am aware of. If the GTR computer has different code that isn’t in the GTS, then you may need to use an Arduino or something to control the splitter. That’s what I have to do with the rear wing project.

Even the cabin button for the rear auto wing goes through the computer first.
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Old Feb 2, 2021 | 03:49 AM
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Originally Posted by xxxPaulxxx
Nice! Would be also intrested! What did you pay for the active aero unit?
around $2500...
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Old Feb 2, 2021 | 03:51 AM
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Originally Posted by Skilly
Are you triggering the open and close with the rear active aero set up? The tray is supposed to be the equivalent downforce to a 4" front splitter...

yes ideally, It seems I need the ecu for the front active aero coming out of the gtr though to make it work...

I am trying to find out which wires triggered the motor on the aero tray so I can active it manually...
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Old Feb 2, 2021 | 03:52 AM
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Originally Posted by trbofly
OK. My two cents on your wiring question. I dont believe the triggers are as simple as you are thinking. The decision to open the aero or not is all Computer driven. There isnt a simple speed sensor wire or anything like that. At least not that I am aware of. If the GTR computer has different code that isn’t in the GTS, then you may need to use an Arduino or something to control the splitter. That’s what I have to do with the rear wing project.

Even the cabin button for the rear auto wing goes through the computer first.
please ref to post # 8
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Old Feb 2, 2021 | 11:08 AM
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Originally Posted by mbjj57
yes ideally, It seems I need the ecu for the front active aero coming out of the gtr though to make it work...

I am trying to find out which wires triggered the motor on the aero tray so I can active it manually...
If you are trying activate manually, here is what you need to do.

First, the activation is based on the motor polarity. The motor goes with positive on one side to open, and positive on the other side to close. That’s how the motor works. The issue is that you now need to deal with the limit switches (which i assume are some of the other wires.

So if you made a circuit, it needs to run polarity to the motor until the upper limit switch is activated. Then in reverse run opposite polarity to the motor until the lower limit switch is activated. This can be done with a microcontroller (Arduino) w/motor controller pretty easily, but the trigger is the interesting part. For instance, what do you use to trigger. A switch is really simple. Tapping into the rear aero is a little harder. The motor wires only see voltage during movement. Once the limit switch is hit, the computer shuts of voltage to the motor completely. So finding the right method to trigger is a challenge (solvable tho)

Do you see little limit switches in the mechanism? All the above is based on my knowledge of the rear aero. Happy to chat on the phone if needed.

Please keep in mind I am not an Arduino or circuit genius, which is why my project isnt complete.

Last edited by trbofly; Feb 2, 2021 at 11:11 AM.
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Old Feb 3, 2021 | 11:42 AM
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Originally Posted by mbjj57
yes ideally, It seems I need the ecu for the front active aero coming out of the gtr though to make it work...

I am trying to find out which wires triggered the motor on the aero tray so I can active it manually...
@ronac engineered the bypass for our active aero in the rear - I have to wonder if they could help here as well.
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Old Feb 3, 2021 | 03:43 PM
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Originally Posted by trbofly
If you are trying activate manually, here is what you need to do.

First, the activation is based on the motor polarity. The motor goes with positive on one side to open, and positive on the other side to close. That’s how the motor works. The issue is that you now need to deal with the limit switches (which i assume are some of the other wires.

So if you made a circuit, it needs to run polarity to the motor until the upper limit switch is activated. Then in reverse run opposite polarity to the motor until the lower limit switch is activated. This can be done with a microcontroller (Arduino) w/motor controller pretty easily, but the trigger is the interesting part. For instance, what do you use to trigger. A switch is really simple. Tapping into the rear aero is a little harder. The motor wires only see voltage during movement. Once the limit switch is hit, the computer shuts of voltage to the motor completely. So finding the right method to trigger is a challenge (solvable tho)

Do you see little limit switches in the mechanism? All the above is based on my knowledge of the rear aero. Happy to chat on the phone if needed.

Please keep in mind I am not an Arduino or circuit genius, which is why my project isnt complete.


Got it thanks for your input,

what do you think about those unit to control the aero tray?

Amazon Amazon

https://www.ebay.com/itm/Wireless-9-...id=p5731.m3795

Last edited by mbjj57; Feb 3, 2021 at 06:28 PM.
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Old Feb 4, 2021 | 03:21 AM
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here is the wiring diagram from the Mitsubishi 3000 gt active aero system , similar to the amg gtr front active aero.





Last edited by mbjj57; Feb 4, 2021 at 04:07 AM.
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Old Feb 9, 2021 | 06:40 PM
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closed position:



open/down position


I made it ,

it is working😁.

the tray lowers by 40 mm ish.

it seems the motor has limit switches built in .

the two brown and red wires are the power source.

I am pretty sure I am the first one ever doing this retrofit .



Last edited by mbjj57; Feb 9, 2021 at 06:42 PM.
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Old Feb 9, 2021 | 07:39 PM
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That is a fantastic job! I have a question that you may be able to answer...how easy is it to replace the red circled rubber piece in the attached picture?

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Old Feb 9, 2021 | 10:57 PM
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Originally Posted by ZephyrAMG
That is a fantastic job! I have a question that you may be able to answer...how easy is it to replace the red circled rubber piece in the attached picture?

It is pretty easy to replace this part , 12 push retainer clips to remove ...

Last edited by mbjj57; Feb 9, 2021 at 11:45 PM.
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Old Feb 10, 2021 | 02:47 AM
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Also does anyone know the required Amperage for the rear active aero wing?

edited on 01/01/2023

10A it is...

Last edited by mbjj57; Jan 1, 2023 at 06:31 PM.
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Old Apr 11, 2021 | 02:35 PM
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hey so is it working now? No issues? I'm considering to do the same
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Old Apr 16, 2021 | 04:00 PM
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Originally Posted by xxxPaulxxx
hey so is it working now? No issues? I'm considering to do the same
Yes it is working
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Old Apr 17, 2021 | 05:01 AM
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great could you tell me how you fixed the wiring problem?
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Old Jan 26, 2023 | 07:25 PM
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Originally Posted by ZephyrAMG
That is a fantastic job! I have a question that you may be able to answer...how easy is it to replace the red circled rubber piece in the attached picture?

Reviving an old thread on that rubber piece. Anyone with that piece torn, scuffed? I presume the rubber is to protect the actual aero.
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Old Jan 26, 2023 | 08:25 PM
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Im missing half of it on my car, is that something that can be ordered thru mercedes?
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Old Jan 27, 2023 | 12:33 AM
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you can easily replace this part
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Old Jan 27, 2023 | 12:36 AM
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yep $800 for the piece.
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Old Jan 27, 2023 | 12:38 AM
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