The parking lights on both front head light assemblies have melted the plastic of the housing and had to be broken out which seems to indicate an excessive generation of heat and potential fire hazard when bulbs are replaced they keep burning out which is a potential safety hazard.. I have seen several other complaints regarding this same issue and as well an issue very similar to the tail…
2011 Mercedes-Benz C-Class lighting problems
severe 15 complaints filed with NHTSA · avg repair $250 · see lighting across all vehicles →
Failure mileage
Complaints
15
Recalls
0
Avg fix
$250
2fires
When does it fail?
Of the 15 lighting complaints filed for the 2011 Mercedes-Benz C-Class, here's the actual mileage breakdown — failures cluster heaviest at 125,000-150,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
No new NHTSA lighting complaint has been filed on this vehicle in over 6 years — the issue may be aging out of the active population.
The failure pattern owners describe
Buyer takeaway: The 2011 Mercedes C-Class has serious, recurring lighting issues—mainly rear taillights with melted wiring that can fail even after recall service, plus overheating front parking lights with fire risk. Budget for full headlamp or taillight assembly replacement, and have any lighting repaired immediately since heat damage and fire hazard are documented concerns.
Rear taillight wiring failures dominate these complaints. Owners describe brown ground wires in the taillight assemblies overheating, melting, and burning—sometimes with visible smoke—causing partial or complete light outages. The melted wiring damages the plastic taillight housing and connectors. One owner who had the vehicle repaired under recall in 2014 experienced the same failure again at 90,000 miles. Another owner reports the dealer refused warranty coverage, claiming the 2014 recall "addressed" the issue even though the same problem recurred.
Front parking light failures are a second major pattern. Bulbs overheat excessively, melt the plastic headlamp housing, and damage internal harnesses. One owner reports a front parking light fire. Bulbs burn out repeatedly even after replacement. Owners note the issue resembles the recalled rear taillight problem and request a front lighting recall.
Several owners report their vehicles were not included in NHTSA Campaign 14V177000 (Exterior Lighting) despite having identical symptoms. Delayed dealer responses—one owner waited eight months—are also common. One narrative specifically mentions fire risk from exposed wiring after melted harnesses fail. The dimming front headlights complaint describes poor nighttime visibility requiring complete bulb replacement.
Same Mercedes-Benz C-Class lighting reports on nearby years: 2008 · 2009 · 2010
Failure modes owners describe
Rear taillight wiring and connector failure
Brown ground wires in rear taillight assemblies overheat, melt, and burn, causing partial or complete taillight failure. The melted wiring damages the taillight housing and connector. Owners report flickering lights, complete outages, smoke smell, and illuminated warning messages for brake lights, turn signals, and fog lights.
When: 85,000–115,000 miles; failures occur during extended driving with repeated on/off cycling
Symptoms owners cite: Taillight warning message on dashboard; Rear lights dim or fail to illuminate; Melted or burned brown ground wire; Taillight housing melted or damaged; Smoke or burning smell from taillight area; Turn signal and brake light warning messages; Flickering rear lights
Repairs/costs cited: Entire taillight assembly replacement required; bulb replacement alone insufficient
Recalls/TSBs owners mention: NHTSA Campaign Number 14V177000 (Exterior Lighting) issued; however, several owners report the recall repair failed or vehicle VINs not included in original recall coverage. Some owners report repeat failures after recall service was performed in 2014
Front parking light and headlamp assembly overheating
Parking light bulbs in front headlamp assemblies overheat excessively, melting plastic housing and bulb harnesses. Heat generation poses fire hazard and causes bulbs to burn out repeatedly when replaced. Owners report melted wiring exposed within the headlamp assembly.
When: Vehicle age-related; specific mileage not consistently reported
Symptoms owners cite: Parking light bulbs burn out; Melted plastic housing in headlamp assembly; Melted bulb harness; Exposed wiring in headlamp; Front headlamp caught fire (one report); Excessive heat generation in headlamp area
Repairs/costs cited: Entire front headlamp assembly replacement required; bulb-only replacement results in repeated burnout
Recalls/TSBs owners mention: No manufacturer recall issued for front lighting; owners note similarity to rear taillight recall and request that front lighting be included in safety recall
Front headlight dimming and failure
Front headlights produce dim or poor illumination, reducing visibility and creating a nighttime driving safety hazard. Dashboard messages indicate front light problems on both driver and passenger sides.
When: Occurred September 2014 in one report
Symptoms owners cite: Front headlights very dim; Poor forward visibility at night; Dashboard warning messages for left and right front lights
Repairs/costs cited: Complete front bulb replacement indicated as necessary repair
Synthesized from 15 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 1 most recent
Had lighting trouble with your 2011 Mercedes-Benz C-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 lighting problem on the 2011 Mercedes-Benz C-Class?
It's a meaningful issue. 15 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $250.
At what mileage does the lighting typically fail?
Across the 9 complaints that reported odometer mileage, most lighting failures cluster between 74,000 and 100,000 miles, with the median around 90,000. A quarter of owners report trouble before 74,000; a quarter make it past 100,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $250 for lighting 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 lighting?
No active recalls currently cover lighting 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/2011/Mercedes-Benz/C-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.