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So I took delivery of my GTR about 5 weeks ago, I noticed as I drive that I got a pop up message that shows the active aerodynamics logo and tells me that it is inoperable due to decreased ground clearance. I would think to myself, hmm, I do not see a level change in the street but I think to myself the car knows better. Well, now, Everytime I start the car up, I get this message and the manual active aerodynamics button becomes red. I took it to the dealership, the fault reading gave a message of "the underbody spoiler has a malfunction, there is a component Fault" and they stated they could not see anything wrong when they put it up on the lift and that they probably need to remove the front wheels, front bumper and under armor to be able to get to the actuators that could be faulty!!!
I have no confidence in the dealership given they told me in the beginning this logo is for the rear spolier and they wanted to execute a procedure which pops up according to my vin no!! I am like, this is a fixed spolier, then they showed me the message and I told them this is under the car and not the one behind car!!
Any ideas or connections to a better dealership in Germany that could help? Or better yet a contact in AMG itself.
Sounds like you definitely need another dealer to properly diagnose the problem before tearing your car apart.
Good luck!
Absolutely, I intend in doing so but I wanted to post this here as well in case anyone has any ideas or if someone has good connections in AMG for recommendations.
Hopefully someone here or on the PL will be able to help. This is they're flagship car after all.
Hopefully, I am In no hurry as this is a track functionality and it is too hot to go to the track here. We have a couple of months before the weather becomes acceptable.
Sorry to hear you are having a problem with your new beast from the green hell.
It seems logical that they need to remove under armor and whatever other component to get to the malfunctioning part based on pics you shared.
If you do not trust that dealer, then just go to another one that is AMG certified.
I am pleased to let you all know that the issue has been resolved. I took the car to a neighboring country dealership who had far more experience and were able to fix it on the spot. I really can't fathom what the original dealership were thinking but they could have just been blowing off by making it sound like they have to take the whole car apart before they see whats up and I also did not get to see the car on the lift. Quite unhappy with that behavior if that was the case, either that or they are truly incompetent as they were trying to convince me the issue is with the rear spoiler!!! Till I explained to them otherwise.
Well, this dealer put the car on the lift and called me into the workshop immediately, the underbody spoiler was stuck in open position and when pushed upwards made a clicking noise close to a spring sound. They stated they would need to unbolt the spoiler which had clear bolts marked - no need to remove bumpers or under armor and they discoveres a spring had come lose. They noted down all part numbers necessary to control the motion of the underbody spoiler and fixed the loose spring. Lo and behold, two hours later, I drove off with my car with the active aerodynamics back on. 👍🏼👏
Nice. Glad you got it taken care of. Similar thing happened to me with a Lexus years ago. Clutch was making weird noises. Two dealerships wants to tear the car apart to figure it out. The third dealership I went to knew what it was instantly and all it needed was a simple spring fix. Took all of 20 minutes.
For future reference, I don't think that error message means the active aero was malfunctioning DUE TO reduced ground clearance. It means the spoiler is stuck open. And that means you NOW HAVE reduced clearance. So be careful when going on bumps and stuff, you're going to scrape.
For future reference, I don't think that error message means the active aero was malfunctioning DUE TO reduced ground clearance. It means the spoiler is stuck open. And that means you NOW HAVE reduced clearance. So be careful when going on bumps and stuff, you're going to scrape.
True, i only found out later when i saw the car on the lift.
I think I have this same issue on my 2017 GTR. I have the same warning on dash saying “Caution, reduced ground clearance” and speed is limited to 120mph.
The active aero on the front is stuck in the down/open position, I can push it up with my hand but doesn’t feel like anything is connected to it so just drops back down to the down/open position.
Can you remember where these springs were that pull it back up as hoping that’s what’s wrong with mine and can just pop them back in.
I think I have this same issue on my 2017 GTR. I have the same warning on dash saying “Caution, reduced ground clearance” and speed is limited to 120mph.
The active aero on the front is stuck in the down/open position, I can push it up with my hand but doesn’t feel like anything is connected to it so just drops back down to the down/open position.
Can you remember where these springs were that pull it back up as hoping that’s what’s wrong with mine and can just pop them back in.
Here are one or two things you can look into if you are a DIY person:
There are no springs involved in the up/down movement of the front aero splitter. Instead, a motor is used to lift and lower the splitter via a short metal cable.
To diagnose the issue, start by checking the fuse panel in the trunk. Ensure that fuses 73, 75, 77, and 82 are intact, as one of these fuses supplies power to the front splitter.
AMG GT Class
If the fuses are functioning correctly, the problem may lie with the aero motor itself. If you are able to test it, follow these steps:
Disconnect the Aero Motor connector from the car (see picture).
Aero connector
Apply 12V DC to the red/brown and brown/red wires in the connector that lead to the aero splitter (see red arrows above). Applying 12V DC in one direction will cause the motor to either raise or lower the splitter. Reversing the polarity will change the direction of movement. Make sure your 12V DC power supply can provide at least 10 amps.
If the motor operates, the issue might be with the wiring or the sensor cluster in the aero unit.
If the motor does not work, the motor unit itself may be faulty.
Here are one or two things you can look into if you are a DIY person:
There are no springs involved in the up/down movement of the front aero splitter. Instead, a motor is used to lift and lower the splitter via a short metal cable.
To diagnose the issue, start by checking the fuse panel in the trunk. Ensure that fuses 73, 75, 77, and 82 are intact, as one of these fuses supplies power to the front splitter.
AMG GT Class
If the fuses are functioning correctly, the problem may lie with the aero motor itself. If you are able to test it, follow these steps:
Disconnect the Aero Motor connector from the car (see picture).
Aero connector
Apply 12V DC to the red/brown and brown/red wires in the connector that lead to the aero splitter (see red arrows above). Applying 12V DC in one direction will cause the motor to either raise or lower the splitter. Reversing the polarity will change the direction of movement. Make sure your 12V DC power supply can provide at least 10 amps.
If the motor operates, the issue might be with the wiring or the sensor cluster in the aero unit.
If the motor does not work, the motor unit itself may be faulty.
ok took it all off and took it to bits. Some things seemed a bit loose so got it all back together. Test the motor and it pulled the cables back in & out so worked both ways.
Got it all back attached to the car, used the motor to wind it all back in beforehand so it’s in the up position. Started the car back up and car recognises that it’s up because the warning about low ground clearance is gone. That was even there where the entire system was disconnected so it definitely recognises it’s now in the up position at least.
The only issue I seem to have now is the car is still limited to 120mph. So any ideas how to fix that? Figure car needs resetting or something maybe to fix that but don’t know how.
2025 Lucid Air Grand Touring, 2022 F-150, 1926 Rolls-Royce SSG roadster
Originally Posted by Td33
Hopefully someone here or on the PL will be able to help. This is they're flagship car after all.
Mercedes' flagship car is a bloated, overloaded Maybach Electric SUV AMG with every conceivable option tacked on. (And in the United States with a dealer markup label saying the dealer is adding an extra $50,000 because, obviously, the buyer is rich and generally stupid.)
ok took it all off and took it to bits. Some things seemed a bit loose so got it all back together. Test the motor and it pulled the cables back in & out so worked both ways.
Got it all back attached to the car, used the motor to wind it all back in beforehand so it’s in the up position. Started the car back up and car recognises that it’s up because the warning about low ground clearance is gone. That was even there where the entire system was disconnected so it definitely recognises it’s now in the up position at least.
The only issue I seem to have now is the car is still limited to 120mph. So any ideas how to fix that? Figure car needs resetting or something maybe to fix that but don’t know how.
Are you sure the front aero goes down at 60mph when in race mode and pulls back when you are below 40mph? And does it multiple times with no errors?
to reset all car’s controllers, disconnect your battery for 10 min to bring all the CANBUS back to zero. See if this fix the issue.
Are you sure the front aero goes down at 60mph when in race mode and pulls back when you are below 40mph? And does it multiple times with no errors?
to reset all car’s controllers, disconnect your battery for 10 min to bring all the CANBUS back to zero. See if this fix the issue.
I can’t tell in the car but I don’t think the active aero is working when it’s on the car. Off the car we tested the motor by giving power to the pins and the motor worked both ways and we left it with the aero pulled up.
Putting it all back on the car and the car knows something is different because before we put it back on and even with the entire unit off the car whenever I would start the car I would get the warning on the dash about ground clearance.
However first start with it back on the car the warning about ground clearance is gone so the sensors must be working to tell the car that the aero is now up.
Mechanically there seems to be nothing at all wrong with the aero unit so I think it must be software now that maybe it needs a reset or some kind of calibration to confirm it’s working. Scanning it just give me the same error it had before and the code won’t clear but i can’t see what component could be at fault when they all appear to be working fine when tested.
I can’t tell in the car but I don’t think the active aero is working when it’s on the car. Off the car we tested the motor by giving power to the pins and the motor worked both ways and we left it with the aero pulled up.
Putting it all back on the car and the car knows something is different because before we put it back on and even with the entire unit off the car whenever I would start the car I would get the warning on the dash about ground clearance.
However first start with it back on the car the warning about ground clearance is gone so the sensors must be working to tell the car that the aero is now up.
Mechanically there seems to be nothing at all wrong with the aero unit so I think it must be software now that maybe it needs a reset or some kind of calibration to confirm it’s working. Scanning it just give me the same error it had before and the code won’t clear but i can’t see what component could be at fault when they all appear to be working fine when tested.
If you checked that fuse 73,75,77, and 82 are all good, and did the controllers reset procedure, then I am afraid the rest is above my pay grade. Sorry, I could not help.
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