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What 25 owners told NHTSA about the 2014 Mercedes-benz S-class Phev

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (25)Crash / fire / injury (5)Visibility & wipers (4)Brakes (3)Steering (3)Airbags (2)Fuel system (2)Seat belts (2)Suspension (2)Transmission & drivetrain (2)Body & structure (1)Driver assistance (1)

3 of 25 complaints match · Steering · clear filters

Nov 12, 2021SteeringTransmission & drivetrainFuel system

What component or system failed or malfunctioned, and is it available for inspection upon request? -Steering :Electrical Power Assist , Drive Shaft

NHTSA ODI 11440259

Jun 21, 2018Steering

ACCORDING TO THE RECALL NHTSA CAMPAIGN ID NUMBER: 16V899000 AND THE VEHICLE INSPECTION REPORT FROM THE LOCAL MERCEDES DEALERSHIP SHOW AS AN IDENTICAL ISSUE. HOWEVER, MY VEHICLE IS NOT IDENTIFIED AS APART OF THE RECALL. THE RECALL STATES THE ISSUE IS DUE TO THE STEERING CONTROL UNIT NOT BEING SOLDERED PROPERLY. DIFFICULT TO THINK THIS FALLS UNDER NORMAL WEAR AND TEAR. I WILL GET THE REPAIR DONE BEGRUDGINGLY, THOUGH IT WOULD BE NICE IF MERCEDES WOULD HAVE STOOD BEHIND ITS RECALL.

NHTSA ODI 11102977

Feb 26, 2016Steering

WHEN MAKING TURNS BOTH LEFT AND RIGHT, THERE IS A MOANING NOISE HEARD. CAUSE: LOWER ENGINE COMPARTMENT CENTER AND REAR, STEEERING COUPLING, RUBBER BELLOWS ON STEERING.

NHTSA ODI 10838560

Working with the data? Download all 25 complaints as CSV · fetched from NHTSA July 21, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2014 Mercedes-benz S-class Phev verdict →