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Emissions-related ports in cylinder head may clog on Mercedes-Benz 500SEL

Problem Description and Possible Solution

Ports in the cylinder head related to the emissions air injection and EGR systems can clog; the cylinder head should be removed and the ports cleaned.

Problem Data
RepairPal Verified
Average mileage: (–)
2 model years affected: 1992, 1993
2 people reported this problem