Mercedes W212 E220 CDI DPF Blocking — Short Trip Use
The DPF on W212 E220 CDI blocks progressively with city driving use. Forced regeneration at a workshop resolves most cases. Repeated blockage indicates a usage pattern problem or incorrect engine oil specification. Use only MB 229.51 or 229.52 low-SAPS oil. DPF replacement costs £600-1,500 if cleaning fails.
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