How to Troubleshoot the Instrument Panel on a Mercedes 123

Written by daniel valladares
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How to Troubleshoot the Instrument Panel on a Mercedes 123
A fully operational instrument panel is a safety necessity. (detail: glowing dashboard image by davidcrehner from Fotolia.com)

The Mercedes-Benz 123 was a series of Mercedes vehicles that include the 200, 230, 250 and 280 models, produced from 1976 until the 1986 model year. If there is a problem afflicting the instrument panel on your Mercedes 123, the possible causes for the problem are a faulty fuse or a faulty instrument panel. Replacing both takes relatively little time, but replacing a faulty instrument panel is a lot more expensive than replacing a faulty fuse.

Skill level:
Easy

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Things you need

  • Replacement fuse
  • Replacement instrument panel
  • Instrument panel remover

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Instructions

  1. 1

    Turn the Mercedes 123's engine off and open the left-hand side door. Locate the fuse box to the far left of the steering wheel, on the side of the dashboard.

  2. 2

    Remove the cover from the fuse box with a screwdriver. Pull the cover rearward.

  3. 3

    Remove the instrument panel fuse. The location of the fuse depends on the type of vehicle you have. A fuse chart is included with your 123 and is located within the fuse box. Once you have removed the fuse, install a replacement fuse. Again, the fuse will depend on the type of vehicle you own.

  4. 4

    Reattach the cover to the fuse box and close the driver's side door. If your instrument is now fully functional, the problem was a blown or faulty fuse. If not, you will have to replace the instrument panel.

  1. 1

    Turn off the 123's engine.

  2. 2

    Lower the steering wheel.

  3. 3

    Slide the remover into the lower corner of the instrument panel and yank the panel out. Repeat the process with the other bottom corner.

  4. 4

    Reach behind the 123's instrument panel and unplug its two electrical wire harnesses. Pull the instrument panel out and place a new instrument panel into the 123. Reconnect its electrical wire connectors before securing the instrument panel into place.

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