What are the chronic problems of the CLS 220d 9G-TRONIC?
2019 · CLS 220d 9G-TRONIC · 4 verified findings
"Is the Cls CLS 220d 9G-TRONIC reliable, and what should you check?"
The most frequently mentioned issue when buying a used Mercedes-Benz CLS 220d 9G-TRONIC 2019: AdBlue / SCR system anomalies. Also, DPF clogging is frequently reported.
Be cautious
Most reported issue: AdBlue / SCR system anomalies. Service history and a test drive matter.
Engine / trim
CLS 220d 9G-TRONIC
Model years
2019
Known issues and risks
Listed from most frequently reported, each with its source.
AdBlue / SCR system anomalies
Often reported
Reported anomalies and faults in the SCR/AdBlue system (dosing pump, AdBlue nozzle/injector, crystallization in the channel); can lead to warnings, NOx errors, and sometimes emergency intervention situations.
Exhaust Emissions
DPF clogging
Often reported
The 2.0 OM654 diesel engine may experience frequent incomplete regenerations or DPF clogging, especially in city or short-distance driving.
Exhaust Emissions
Carbon buildup in the EGR valve
Often reported
In OM654 engines, the EGR valve tends to accumulate soot and carbon deposits, which can lead to malfunction, ECU errors, and loss of efficiency.
Exhaust Emissions
Piezoelectric injector sensitivity
Often reported
The OM654 engine family uses advanced high-pressure piezoelectric injectors that can be sensitive to fuel quality and maintenance; this can lead to injector failure or power loss.
What should I pay attention to when buying a Mercedes-Benz CLS 220d 9G-TRONIC?+
When buying a 2019 CLS 220d 9G-TRONIC, you should check the service history, test drive, and engine/transmission warnings. The most frequently reported issues: AdBlue / SCR system anomalies; DPF clogging; carbon buildup in the EGR valve.
What are the chronic problems of the Mercedes-Benz CLS 220d 9G-TRONIC?+
The most frequently reported issues: AdBlue / SCR system anomalies; DPF clogging; carbon buildup in the EGR valve.
Is the Mercedes-Benz CLS 220d 9G-TRONIC reliable?+
Instead of a simple yes/no, it is necessary to weigh the proven pros and cons together. This page lists 4 verified findings.
How does Carbeak collect data?+
The cards on this page are derived from European fault records records; the source vehicle is matched to the target vehicle by brand, fuel, engine, and generation. Topics with insufficient evidence are not shown.
We only publish claims we can verify. Cards come from European fault records and owner reports matched to this vehicle on brand, fuel, engine and generation.
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