Home · 2019 Mercedes-benz Slc-class · Complaints

What 1 owners told NHTSA about the 2019 Mercedes-benz Slc-class

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 (1)Engine (1)Fuel system (1)

1 of 1 complaints match · Engine · clear filters

Apr 1, 2025EngineFuel system

The check engine light is on in my 2019 SLC (only 42K miles) and the car is emitting a lot of smoke from the exhaust pipe and it is hesitating while driving it. I almost got rear ended. I took it to the dealership and the fault code comes back as: P052E71 - The valve crankcase ventilation has a malfunction. The actuator is blocked. I searched online and this appears to be a very common and expensive issue on all Mercedes models. It goes out often in them and the dealer says it is NOT covered under the MB warranty. As it is an emissions issue, I understand that my car will not pass smog check without it and I reside in California where it has to pass smog inspection to register it. Even after I get it repaired, the propensity for it to have to be replaced again in the future is high. Please issue a safety recall issue for this problem.

NHTSA ODI 11652173

Working with the data? Download all 1 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 2019 Mercedes-benz Slc-class verdict →