2014 Mercedes-Benz S550 Electrical system Problems
- Complaints
- 1about this part
- Share
- 4%of 24 total for the year
- Median mileage
- 2,200miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the electrical system of the 2014 Mercedes-Benz S550, 4% of the 24 complaints for this model year. Where a mileage was given, the median is 2,200 miles. 1 of these say a crash was involved, according to the filers.
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.
“I purchased a new 2014 mercedes S550 and the day after purchase, the airbag malfunction light came on. I set up an appointment to have this corrected, and was told it was fixed. A couple of weeks later, I was traveling at approximately 20mph, approaching an intersection where I did not have a stop sign. I noticed a large SUV traveling east bound at excessive speeds (guessing 35-40), which did not appear to be stopping, but could not stop in time to avoid the collision. The SUV impacted the driver's side of my vehicle at full speed. …”
NHTSA complaint #10575159, filed 2014-03, 2,200 milesRelated service bulletins
- 11036511Aug 24, 2026Complaint Tailgate opens unintentionally. Cause Accidental or unnoticed activation of the button to open the tailgate on the vehicle key. EXAMPLE: when stored in trouser pocket…
- 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…
- 11026835Dec 18, 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…
- 11023347Sep 25, 2025Complaint The result from the XENTRY battery test does not match the current state of the battery. Cause The XENTRY battery tester uses the stored on-board electrical system data…
- 11020872Jul 16, 2025Complaint Commissioning not possible after replacement of TRANSMISSION 722.9 or of electrohydraulic controller unit (EHS) or of repair kit controller unit (VGS). Cause The wrong…
- 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…
- 11018206May 2, 2025Complaint The result from the XENTRY battery test does not match the current state of the battery. Cause The XENTRY battery tester uses the stored on-board electrical system data…
- 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…
Electrical system: other model years
Other parts of the 2014 Mercedes-Benz S550
4 complaintsVisibility (wipers, defrost, mirrors)
4 complaintsBrakes
3 complaintsSteering
3 complaintsAir bags
2 complaintsFuel system
2 complaintsSeat belts
2 complaintsSuspension
2 complaintsTransmission and drivetrain
2 complaintsEngine cooling
1 complaintsEquipment
1 complaintsExterior lighting
1 complaints
← All problems reported for the 2014 Mercedes-Benz S550
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