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Mercedes Coolant Temperature Light Meaning

This page explains the coolant temperature light on Mercedes vehicles in plain language.

Treat this as a higher-urgency warning. If the car feels unsafe, pull over and check the manual before driving farther.
ColorAmber or red changes urgencyFlashFlashing usually means act faster

First check

  • Is the light red, amber, green, or blue?
  • Is it flashing or steady?
  • Did it appear right after startup, fueling, service, or weather change?

What to do next

Stop safely when appropriate, check the manual, and avoid long drives until the warning is understood.

Important

Exact symbols vary by model, trim, and year. This guide is a starting point, not a diagnostic scan.

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