Mercedes-Benz S420 problems, recalls & best years
The deets on every S420 from 1995 to 1999: 11 owner complaints and 0 recalls across 4 model years.
The model years with the most owner complaints are 1995 (5), 1999 (4), 1996 (1). Best fuel economy: 16 mpg combined (1999).

Problem areas across all years
Year by year
Want the full repair deets? Get the factory manual.
Recall and complaint data tells you what goes wrong. A service manual tells you how to fix it: torque specs, wiring diagrams, fluid capacities and step-by-step procedures for the Mercedes-Benz S420.
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FAQ
What is the worst year for the Mercedes-Benz S420?
The model years with the most owner complaints are 1995 (5), 1999 (4), 1996 (1).
How many recalls has the Mercedes-Benz S420 had?
Across 1995–1999, NHTSA lists 0 vehicle recall campaigns by model year (a campaign that covers several years counts once per year).