I got my brand new Mercedes benz glc 300 two weeks ago. After driving for 6 days & less than 300 miles in total the SUV stopped responding abruptly in the middle of highway cruising at a speed of 70 MPH with a transmission malfunction error flashing. With no power in the car, I was lucky enough to pull it from the left most lane to the right curb but it was extremely scary to experience the…
2016 Mercedes-Benz GLC-Class electrical problems
severe 12 complaints filed with NHTSA · avg repair $850 · see electrical across all vehicles →
Complaints
12
Recalls
0
Avg fix
$850
1fire
What stands out
No new NHTSA electrical complaint has been filed on this vehicle in over 10 years — the issue may be aging out of the active population.
The failure pattern owners describe
Buyer takeaway: Two modes of failure plague these vehicles: sudden, total electrical shutdown that can kill the engine at highway speeds (creating real safety risk), and a widespread recall for electrical/cooling system issues that sat unfixed for months because parts weren't available. Buyers should have any pre-purchase inspection focus on electrical systems and verify recall work is complete before purchase.
The primary failure involves sudden and complete electrical shutdown while driving. One owner reported losing all power at 70 mph on a highway after only 300 miles of ownership—the transmission went unresponsive, all dashboard lights lit up, and the engine refused to shut off via the push button. Another owner experienced the vehicle stutter and die at a traffic light, with the car refusing to shift into neutral and losing power to door locks and electrical controls while radio and windows remained functional. A third complaint mentioned burning odor and check engine light at 10,000 miles.
Separately, at least six owners received recall notices for NHTSA Campaign 17V114000 (Electrical System, Engine and Engine Cooling) but faced indefinite delays because the manufacturer had no parts available and could not provide an ETA. Some complaints noted the delay exceeded 60 days.
A fourth failure pattern involves chronic, unresolved electrical and engine issues dating to purchase—one owner cited faulty radar sensor, power control unit failure, engine light, and crankcase vent system problems that remained unfixed despite dealer service at 30,000 miles.
None of the narratives provide specific repair costs or definitive root causes beyond references to "faulty transmission parts."
Same Mercedes-Benz GLC-Class electrical reports on nearby years: 2017 · 2018 · 2019
Failure modes owners describe
Complete electrical shutdown / loss of vehicle control
Vehicle loses all or nearly all electrical power while driving. Engine shuts down, transmission becomes unresponsive, steering may lose power assistance, and controls stop functioning. Most dangerous during highway operation.
When: Less than 300 miles (complaint #1); 10,000 miles (complaint #8 – burning smell); mid-drive at traffic light (complaint #9)
Symptoms owners cite: Vehicle unresponsive while cruising at highway speed (70 mph); All dashboard lights illuminate simultaneously; Transmission malfunction error displayed; Engine will not shut off via push button; Engine revs unexpectedly after door cycle; Car stutters and shuts down at traffic light; Radio and windows work but door locks, electric shift, and other components dead; Abnormal burning odor from vehicle; Check engine light illuminates
Codes mentioned: Transmission malfunction error (displayed), Check engine light (complaint #8)
Repairs/costs cited: Complaint #1 cites faulty transmission parts as cause. Complaints #9 and #8 show no repair attempted or completed.
Recalls/TSBs owners mention: NHTSA Campaign 17V114000 (Electrical System, Engine and Engine Cooling) issued but parts unavailable for extended period
Recall parts unavailability (17V114000)
Owners received recall notices for electrical system and engine cooling but dealers and manufacturer could not supply parts for the remedy. Multiple owners reported waiting indefinitely with no timeline provided.
When: Recall notice issued March 2017; complaints filed 2017
Symptoms owners cite: Recall parts not in stock at dealers; Manufacturer unable to provide part availability timeline; Repair remedy delayed beyond reasonable timeframe (exceeding 60 days in some cases)
Recalls/TSBs owners mention: NHTSA Campaign 17V114000 issued March 2017; parts unavailable at Mercedes-Benz of Richmond (VA), Lokey Mercedes-Benz (FL), Mercedes-Benz of Fairfield (CA); manufacturer unable to confirm when parts would arrive
Multiple persistent electrical and engine faults
Owner reports chronic electrical and engine issues that remain unresolved by dealer service despite multiple attempts. Issues include faulty radar sensor, power control unit malfunction, engine light, and crankcase vent system failure.
When: Since purchase December 2015; ongoing through at least 30,000 miles
Symptoms owners cite: Series of electrical problems; Engine problems; Faulty radar sensor; Power control unit failure; Engine light illumination; Faulty crankcase vent system
Codes mentioned: Engine light (illuminated)
Repairs/costs cited: Vehicle serviced at 30,000 miles with no resolution stated
Synthesized from 12 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 1 most recent
Had electrical trouble with your 2016 Mercedes-Benz GLC-Class?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the electrical problem on the 2016 Mercedes-Benz GLC-Class?
It's a meaningful issue. 12 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $850.
At what mileage does the electrical typically fail?
Based on the 12 complaints filed, electrical issues most often appear around 14,951 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $850 for electrical repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to electrical?
No active recalls currently cover electrical issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2016/Mercedes-Benz/GLC-Class.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.