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Mercedes-Benz 420SEL Speedometer Is Not Working

Learn if it's a simple fix or time to seek out a trusted technician.

What are common reasons my Mercedes-Benz 420SEL has a speedometer that doesn't work?

While there are a variety of reasons your Mercedes-Benz 420SEL speedometer is not working, the most common 3 are the vehicle speed sensor (VSS), a faulty speedometer, or an electrical issue.
35%
of the time it's
Vehicle Speed Sensor (VSS)
28%
of the time it's
Speedometer
23%
of the time it's
Electrical Issue

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All instruments, including speedometer, tachometer, fuel and temperature are not working. A/C works. Radio works. Thi...