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  1. Mercedes W123 Over-voltage Protection Relay and Fuse Replacement, Over-voltage Protection Relay and Fuse: step 1, image 1 of 1
  2. Mercedes W123 Over-voltage Protection Relay and Fuse Replacement: step 2, image 1 of 1
    • Look up inside below the dash, just beneath the furthest right side dash vent. You'll see the OVP relay with the red ruse on top.

    • Even if you are just checking the fuse, the easiest way to get access is to remove the entire relay. Simply pull it up and off of the black plug it is attached to, which sits beneath it.

  3. Mercedes W123 Over-voltage Protection Relay and Fuse Replacement: step 3, image 1 of 1
    • This is the OVP relay out from under the dash.

    • The fuse on top slides in side-ways. It is a 10 amp fuse.

    • You can use a needle nose pliers to pull the fuse out of the holder that is attached to the relay.

  4. Mercedes W123 Over-voltage Protection Relay and Fuse Replacement: step 4, image 1 of 1
    • As you can see here, the fuse was blown. The filament is broken internally.

    • Since this was the case, the fuse was replaced. The tachometer returned to normal function indicating that the fuse was the problem.

    • If the fuse continues to blow, the OVP relay may need to be replaced. If the fuse is not blow, you may need to test and/or replace the OVP relay.

Заключение

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

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Nicolas Siemsen

Участник с: 06.12.2013

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2 Comments

Hi,

Thanks for the tutorial, does this apply to 1986 560sl?

Thanks,

Patrick

pepe - Ответить

Hi guys just want to know what amp's are the 2 fuses

By the relay under the hood..thanks in advance

Charles Lottering - Ответить

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