Brake fluid leak from left front caliper crossover tube. Corrosion was found where composite insulator covers crossover tube that allowed weakening of pipe and subsequent loss of braking action. Leak was substantial enough that both channels of master cylinder were deprived of fluid, total loss of brakes, vehicle required towing.
The worst 2014 Mercedes-Benz AMG GL63 problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Brakes2
- Engine1
- Steering1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Brakes2
- Engine1
- Steering1
Recalls 3
Communication
- What is wrong
- Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2013-2017 vehicles due to a software fault that may cause the date and time for the emergency call system (eCall) to differ from the actual date and time, potentially relaying an inaccurate vehicle location. For a full list of the affected models visit:
- Risk
- An inaccurate vehicle location may delay emergency responders, increasing the risk of injury.
- Remedy
- MBUSA has initiated an Over the Air (OTA) remote update. MBUSA will also notify owners, and dealers will check software for a successful OTA or update the communication module software as needed, free of charge. The recall began December 23, 2019. Owners may contact MBUSA customer service at 1‑800‑367‑6372. MBUSA's number for this recall is 2019120008.
Recall number 19V787000 · Recall details
Suspension: front
- What is wrong
- Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2012-2014 ML350 Bluetec 4Matic and ML550 4Matic, 2012-2015 ML63 AMG 4Matic and ML350 4Matic, 2013-2016 GL350 Bluetec 4Matic, GL550 4Matic and GL63 AMG 4Matic, 2017 GLS350d 4Matic, GLS450 4Matic, GLS550 4Matic and GLS63 AMG 4Matic, 2015 ML400 4Matic, 2016 GLE400 4Matic, GLE350 4Matic, GLE63 AMG 4Matic, GLE63S AMG 4Matic, GLE450 4Matic Coupe and GLE63S AMG 4Matic Coupe, 2015-2016 GL450 4Matic and 2013-2014 GL450 4Matic vehicles equipped with the Active Curve System (ACS). In certain driving conditions, if the oil level in the ACS reservoir is below the minimum level, the oil may foam and leak out of the vent holes in the reservoir cap.
- Risk
- The leaking oil in the presence of an ignition source can increase the risk of a fire.
- Remedy
- MBUSA will notify owners, and dealers will correct the oil level as necessary and replace the reservoir sealing cap to prevent oil foam from leaking out, free of charge. The recall began August 30, 2018. Owners may contact MBUSA customer service at 1‑800‑367‑6372. MBUSA's number for this recall is 2018070015.
Recall number 18V272000 · Recall details
Child seat: latch strap
- What is wrong
- Mercedes Benz USA, LLC (Mercedes) is recalling certain model year 2014 GL350 BlueTEC 4Matic, GL450 4Matic, GL550 4Matic, and GL63 AMG vehicles manufactured November 4, 2013, through November 15, 2013. In the affected vehicles, the foldable second row seat bottom may not fold down low enough to allow proper use of the child seat achors. As such, these vehicles do not conform to Federal Motor Vehicle Safety Standard (FMVSS) number 225, "Child Restraint Anchorage Systems."
- Risk
- Without the use of the lower anchor points, a child restraint may be insufficiently or improperly anchored to the seat, increasing the risk of injury to the child in the event of a crash.
- Remedy
- Mercedes will notify owners, and dealers will inspect and, if necessary, replace the seat pan of the second row seat, free of charge. The recall began on May 2, 2014. Owners may contact Mercedes at 1‑800‑367‑6372.
Recall number 14V158000 · Recall details
Technical service bulletins for the 2014 Mercedes-Benz AMG GL63 79
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Engine
- Visibility/wiper
- Repeat workshop visit for vehicle vibration while braking from 60MPH. NOTE: Although the symptom is...
- Clanking noise from the area of the speakers in the doors
- During part of the steering movement, it feels heavier or more difficult to steer in the same spot every time
- A popup is seen on the HU with the message "data connection temporarily not available". Potentially...
- Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end)
- Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements...
- The customer requests deactivation of the N112/9 HERMES communication module Note: Deactivation of the...
- After successful commissioning of the HERMES control unit (N112/9) with XENTRY Diagnosis DVD 03/2026, the...
What 2014 Mercedes-Benz AMG GL63 owners say
Most recent owner complaints, unedited.
1. The power steering wheel is stuck at the top position once in a while. 2. Active curve system pump will fail and leak fluids in 30000-40000 miles.
The car ran out of brake fluid - there was an indicator and when taken to service we were told the reservoir was empty. What is alarming is that the car is serviced very frequently and one set of brakes was recently replaced (about 6 months). Moreover the dealer stated there was no leak. They stated that they do not replenish the brake fluid when replacing pads, in essence, because the fluid system is so fragile and they are afraid they will do more harm than good. It seems like a straightforward proposition that if the brakes are checked and pads replaced frequently, and there is no leak, there should be no possible way for the fluid to go empty absent a defect in the car (excess fluid consumption for some reason besides a leak) or faulty maintenance procedures. I believe the practice of not replenishing brake fluid - described to me as the normal practice at mercedes service, not a 1-time mistake - is negligent. Contributing factors include (1) mercedes brakes are known to wear very quickly (roughly annual brake pad change); (2) the 2014 model adaptive cruise system tends to apply the brakes very often, I.e. Unintelligent algorithm that uses brakes continually while cruising at 70 MPH on freeway, not something a human would ever do
Compare the 2014 Mercedes-Benz AMG GL63
Other model years
Questions about the 2014 Mercedes-Benz AMG GL63
Is the 2014 Mercedes-Benz AMG GL63 reliable?
Owners have filed 3 complaints about the 2014 Mercedes-Benz AMG GL63, 1.5 times a typical AMG GL63 model year.
What is the most common problem with the 2014 Mercedes-Benz AMG GL63?
Brakes, with 2 complaints. Next is engine (1).
How many recalls does the 2014 Mercedes-Benz AMG GL63 have?
3 recalls, covering communication, suspension and child seat.
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