2014 Mercedes-Benz GL450 Electrical system Problems
- Complaints
- 3about this part
- Share
- 14%of 21 total for the year
- Median mileage
- 57,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the electrical system of the 2014 Mercedes-Benz GL450, 14% of the 21 complaints for this model year. Where a mileage was given, the median is 57,000 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Oil leaking and wicking into camshaft position sensors, camshaft magnets, O2 sensors, engine wiring harness and ultimately, the ECU is destroying all electronic components connected to the engine causing misfiring and seizing. The issue is quite prevalent via internet research as potentially thousands of owners all experience the same issue. Our local Mercedes Benz dealer indicated this issue just popped up immediately outside the warranty period (1 yr) for our used purchase, and would require a replacement of the camshaft, sensors, magnets, and wiring harness to the tune of $14,000. …”
NHTSA complaint #11457964, filed 2022-03“The contact owns a 2014 Mercedes-Benz GL450. While operating the vehicle, several messages displayed regarding the parking brake release, transmission, and the vehicle being inoperable. Also, several electrical features malfunctioned. The vehicle was towed to world wide motors inc. (3900 east 96th st, indianapolis, in) where it was diagnosed that the main vehicle wire harness was damaged due to water that drained from the sun roof into the panels of the vehicle. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 57,000.”
NHTSA complaint #11244201, filed 2019-08, 57,000 milesRelated service bulletins
- 11036190Aug 6, 2026Complaint A popup is seen on the HU with the message "data connection temporarily not available". Potentially affected functionalities in NTG4.5, NTG5 1.Weather 2.Local Search…
- 11033185May 26, 2026Complaint After successful commissioning of the HERMES control unit (N112/9) with XENTRY Diagnosis DVD 03/2026, the message "SOS - service not activated" appears on the…
- 11033016May 26, 2026Complaint The customer requests deactivation of the N112/9 HERMES communication module Note: Deactivation of the HERMES control unit (N112/9) is not supported for gray-market…
- 11018626May 22, 2025Complaint After a software update of HERMES communication module N112/9 has been performed on a gray import vehicle, the message "SOS - Service not activated" is displayed in the…
- 11017119Apr 21, 2025Complaint A popup is seen on the HU with the message "data connection temporarily not available". Potentially affected functionalities in NTG4.5, NTG5 1.Weather 2.Local Search…
- 11015640Mar 5, 2025Complaint During a phone call, the called party has difficulty understanding/cannot understand the driver, or interference/background noises are audible to the called party…
- 11013086Jan 15, 2025Complaint The flap of the reversing camera opens and closes by itself during forward travel several times during the trip. No camera image is displayed in the head unit. The…
- 11010907Nov 25, 2024Complaint The flap of the reversing camera opens and closes by itself during forward travel. This happens several times during the trip. The customer notices the sound of opening…
- 11010755Nov 20, 2024Complaint After a control unit replacement of "N112/9 - control unit for telematics services (HERMES)" or the "N112/2 - control unit for telematics services (RAMSES)", the…
- 11008880Oct 3, 2024Complaint After a control unit replacement of "N112/9 - control unit for telematics services (HERMES)" or the "N112/2 - control unit for telematics services (RAMSES)", the…
Electrical system: other model years
Other parts of the 2014 Mercedes-Benz GL450
7 complaintsOther or unknown
3 complaintsVisibility (wipers, defrost, mirrors)
3 complaintsBrakes
2 complaintsTransmission and drivetrain
2 complaintsExterior lighting
1 complaintsLane departure
1 complaintsLatches, locks and linkages
1 complaintsSeats
1 complaintsBody and structure
1 complaintsSuspension
1 complaintsWheels
1 complaints
← All problems reported for the 2014 Mercedes-Benz GL450
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology