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What 27 owners told NHTSA about the 2017 Mercedes-benz CLA

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 (27)Crash / fire / injury (3)Electrical system (7)Airbags (5)Engine (4)Transmission & drivetrain (4)Body & structure (3)Visibility & wipers (3)Steering (2)Wheels (2)Engine & cooling (1)Equipment (1)

3 of 27 complaints match · Visibility & wipers · clear filters

Jul 1, 2024Visibility & wipers

The contact owns a 2017 Mercedes-Benz CLA250. The contact stated while driving 60 MPH, the contact heard a loud pop inside the vehicle. The vehicle was steered to the side of the road and the contact observed that the sunroof panel was missing. A Police Officer passing by stated that he observed that the panel had detached and land on the street. The vehicle was taken to a dealer where it was diagnosed that the panel needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 90,000.

NHTSA ODI 11597877

Jun 28, 2021Visibility & wipers

The contact owns a 2017 Mercedes-Benz CLA250. The contact stated that on two separate occasions while driving at various speeds, the panoramic sunroof detached from the vehicle without warning. The contact stated that the roof remained exposed with the wires from the sunroof hanging from the ceiling. The contact had taken the vehicle to the dealer twice where the replacement part for the sunroof were ordered. An independent glass technician repaired the panoramic sunroof however, the failure persisted. The manufacturer was notified of the failure by email however, there was no response. The vehicle was not yet repaired. The approximate failure mileage was 61,500.

NHTSA ODI 11422653

Apr 6, 2018Visibility & wipers

REAR WINDOW EXPLODED AFTER TURNING ON REAR DEFROST, VEHICLE WAS STATIONARY WHEN REAR WINDOW EXPLODED.

NHTSA ODI 11083637

Working with the data? Download all 27 complaints as CSV · fetched from NHTSA July 19, 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 2017 Mercedes-benz CLA verdict →