Introduction

Here is a step-by-step guide on how to disassemble and troubleshoot a faulty Mercedes w114/115 clock.

Image 1/2: Carefully pull out the clock without damaging any other parts. Image 2/2: Carefully pull out the clock without damaging any other parts.
  • Locate the area that houses the clock. Unscrew the two barrels and place it aside.

  • Carefully pull out the clock without damaging any other parts.

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Image 1/3: Image 2/3: Image 3/3:
  • Connect the screw (located behind the clock) to the negative supply of the battery, and then the small pin to the positive supply.

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Image 1/3: Image 2/3: Image 3/3:
  • To check the clock, set the time to something you can remember and set it aside.

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Image 1/3: Take a small bulb and socket and bridge a wire from the 12v pin supplied from the electrical connector, to one of the two wires on the bulb and socket. Image 2/3: Next find a ground supply nearby ( the best place would be the key hole) and bridge another wire from it to the second available wire on the bulb and socket. Image 3/3: If the bulb lights up, it means your clock has power.
  • To check the power supply of the clock, locate the electrical connector and find the pin on it which supplies the power (12v) to the clock.

  • Take a small bulb and socket and bridge a wire from the 12v pin supplied from the electrical connector, to one of the two wires on the bulb and socket.

  • Next find a ground supply nearby ( the best place would be the key hole) and bridge another wire from it to the second available wire on the bulb and socket.

  • If the bulb lights up, it means your clock has power.

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Image 1/2: Image 2/2:
  • If the bulb lights up, the power supply to the clock is good.

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Image 1/1: Start reassembling the dashboard by following the guide in reverse order.
  • Before putting the clock in, clean the holder with a sand paper or a flat headed screw driver.

  • Start reassembling the dashboard by following the guide in reverse order.

  • While reassembling, be careful not to damage the wire harness , oil pressure meter hose, and temperature meter cable.

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Conclusion

To reassemble your device, follow these instructions in reverse order.

3 other people completed this guide.

Chaga Edirisinghe

Member since: 02/20/2014

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