Active Curve System Malfunction
Thread Starter
Junior Member
Joined: Jun 2025
Posts: 16
Likes: 2
From: Georgia, and Texas
13’ GL63 AMG, 17’ GLS550, 14’ F-150 FX4, 13’ Scion FR-S, 97’ Toyota Crown Royal & 17' Durango R/T
Active Curve System Malfunction
Hey y’all,
new to the forum. Got my GL63 a year ago from my uncle who is AMG obsessed. The problem developed a month later after some regular maintenance servicing at a local independent shop.
i just replaced both front air struts, had a failure on the driver side a few months ago and just did the passenger a few days ago. Will be replacing the rears and both rear shocks too. Anyhow, the issue pops up on curves that make the vehicle lean to the right. It feels like something lets go up front on the driver side for a moment, and you’ll hear a very slight pop.
my hydraulic fluid is clean and no issues with the top popping off. I’m leaning towards replacing the sway bar links and bushings. Any insight would be amazing. Thank y’all.
new to the forum. Got my GL63 a year ago from my uncle who is AMG obsessed. The problem developed a month later after some regular maintenance servicing at a local independent shop.
i just replaced both front air struts, had a failure on the driver side a few months ago and just did the passenger a few days ago. Will be replacing the rears and both rear shocks too. Anyhow, the issue pops up on curves that make the vehicle lean to the right. It feels like something lets go up front on the driver side for a moment, and you’ll hear a very slight pop.
my hydraulic fluid is clean and no issues with the top popping off. I’m leaning towards replacing the sway bar links and bushings. Any insight would be amazing. Thank y’all.
Thread Starter
Junior Member
Joined: Jun 2025
Posts: 16
Likes: 2
From: Georgia, and Texas
13’ GL63 AMG, 17’ GLS550, 14’ F-150 FX4, 13’ Scion FR-S, 97’ Toyota Crown Royal & 17' Durango R/T
Newbie
Joined: Oct 2016
Posts: 8
Likes: 0
GLE 400
2017 gle 400 top off hydraulic fluid
Help appreciated. I have a 2017 gle 400 now with constant active curve malfunction warning but I can't tell the difference. (not an aggressive driver). I can do simple things and was going to first see if the hydraulic fluid was full and top it off if needed. Any considerations when doing that? Should I just take it to the dealer.
Thanks
dbj
Thanks
dbj
Super Member
Joined: Jun 2025
Posts: 784
Likes: 248
From: USA
Hey y’all,
new to the forum. Got my GL63 a year ago from my uncle who is AMG obsessed. The problem developed a month later after some regular maintenance servicing at a local independent shop.
i just replaced both front air struts, had a failure on the driver side a few months ago and just did the passenger a few days ago. Will be replacing the rears and both rear shocks too. Anyhow, the issue pops up on curves that make the vehicle lean to the right. It feels like something lets go up front on the driver side for a moment, and you’ll hear a very slight pop.
my hydraulic fluid is clean and no issues with the top popping off. I’m leaning towards replacing the sway bar links and bushings. Any insight would be amazing. Thank y’all.
new to the forum. Got my GL63 a year ago from my uncle who is AMG obsessed. The problem developed a month later after some regular maintenance servicing at a local independent shop.
i just replaced both front air struts, had a failure on the driver side a few months ago and just did the passenger a few days ago. Will be replacing the rears and both rear shocks too. Anyhow, the issue pops up on curves that make the vehicle lean to the right. It feels like something lets go up front on the driver side for a moment, and you’ll hear a very slight pop.
my hydraulic fluid is clean and no issues with the top popping off. I’m leaning towards replacing the sway bar links and bushings. Any insight would be amazing. Thank y’all.
Do the links and bushings first. It's the most likely fix and a lot cheaper than chasing other ghosts.
Newbie
Joined: Jul 2023
Posts: 6
Likes: 1
GLS 63
Yeah, that pop on a lean is classic. Since you just did the struts, my money is on the sway bar links. They're a common culprit for that exact noise and feeling when the body rolls.
Do the links and bushings first. It's the most likely fix and a lot cheaper than chasing other ghosts.
Do the links and bushings first. It's the most likely fix and a lot cheaper than chasing other ghosts.
Trending Topics
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Newbie
Joined: Oct 2016
Posts: 8
Likes: 0
GLE 400
I wanted to give follow up and also seeking advise. I added hydraulic fluid and that resolved the active curve malfunction issue for a few weeks then, the warning returned. This has now happened several times and each time the fluid cap has popped off no obvious leak. I have a 2017 which is immediately after the hydraulic cap recall. I'm told I have the "new" cap. When I've been getting the malfunction warning, every time the cap has popped off. I push it back on and the warning goes off immediately. (It is not loose and does take some effort to pull it off). My MB service says that the cap popping off won't initiate the warning but he is happy to sell me a new cap $60. Today, the cap was popped and for the first time, I noted hydraulic fluid on the reservoir top and dripping down the side. The tank was also low on fluid. Could this be some type of excessive pump pressure problem? I'm sure the dealer will gladly sell me a new pump but do I need it? I hear no noise when turning at the time of the warning. Any help/thought appreciated.
dbj
dbj
