Mercedes-Benz C-Class2018

• Diesel engines solid if highway-driven; DPF clogs badly on stop-start city use — ask service history and confirm regeneration cycles were done regularly.
• Median mileage (158k km) sits comfortably in expected range; prices up 4% year-on-year, suggesting stable market value with modest demand.
• EGR valve carbon sticking and injector fouling are common on this generation — budget €600–1,500 if either surfaces; request full service records proving dealer maintenance.
• Before buying, run a full diagnostic scan for active or stored engine fault codes; limp mode and rough idle are red flags needing immediate investigation.
• On inspection, check DPF regeneration status via dealer diagnostics and confirm recent motorway miles in service history — short urban trips spell future expensive repairs.

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