Upon startup in cold weather...strong odor of gasoline can be noticed in passenger compartment. Internet search shows this to be a problem with the fuel line connected to the high pressure fuel pump.
2017 Mercedes-Benz CLA-Class engine problems
moderate Owners of the 2017 Mercedes-Benz CLA-Class have filed 3 NHTSA complaints about the engine at roughly $3,100 to repair (U.S. federal records, as of September 2026). Source: NHTSA Office of Defects Investigation. See engine across all vehicles →
Complaints
3
Recalls
0
Avg fix
$3,100
| Model year | engine complaints |
|---|---|
| 2014 CLA-Class | 35 |
| 2015 CLA-Class | 28 |
| 2016 CLA-Class | 7 |
| 2017 CLA-Class (this page) | 3 |
| 2018 CLA-Class | 5 |
| 2019 CLA-Class | 5 |
| 2020 CLA-Class | 3 |
What stands out
Of the 7 model years of Mercedes-Benz CLA-Class we track for engine problems, this one has the fewest owner complaints on file (3).
No new NHTSA engine complaint has been filed on this vehicle in over 5 years — the issue may be aging out of the active population.
What owners are reporting 3 most recent
Tl* the contact owns a 2017 Mercedes-benz cla250. The contact stated that soon after having her oil changed, a coolant warning light illuminated on the instrument panel. The contact then took the vehicle to an independent mechanic where coolant was added. The contact also mentioned that the home screen would go blank intermittently while driving at various speeds. Upon investigation, the contact…
Approximately 6 months I noticed my vehicle began to emit an odor and is not responsive immediately when I press on the gas. During this time period a yellow check engine light appeared on my dashboard. My local mechanic recommended Christopher Motors in Warwick Rhode Island and German Motors in Providence, Rhode Island, who specializes in Mercedes. I scheduled an appointment and took the…
Had engine trouble with your 2017 Mercedes-Benz CLA-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 engine problem on the 2017 Mercedes-Benz CLA-Class?
It's a documented issue but not catastrophic. 3 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
At what mileage does the engine typically fail?
Mileage data is limited for this issue. Owners report failures across a wide range, suggesting cause is more about driving conditions and maintenance than mileage alone.
What does it cost to fix?
Independent shops typically charge around $3,100 for engine 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 engine?
No active recalls currently cover engine 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/2017/Mercedes-Benz/CLA-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.