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Mercedes-Benz · High-Voltage Battery & Charging

High-voltage fuses and service disconnect

The main high-voltage fuse and the manual service disconnect that a technician removes to isolate the pack before working on it.

Also called service plug, MSD, pyrofuse.

How you know it is this

  • A completely dead high-voltage system
  • A blown main fuse after a fault elsewhere
  • A pyrotechnic fuse that has fired after an impact

Worth knowing before you buy

  • THE SERVICE DISCONNECT IS THE SAFETY DEVICE that makes all other work on this system possible. It is not an ordinary part.
  • Many cars have a PYROTECHNIC fuse that fires in a collision to isolate the pack instantly. Once fired it must be replaced and it is a one-use explosive device.
  • A main fuse that has blown did so for a reason. Replacing it without finding the fault is dangerous.

What we need to quote it. The chassis number and the fault codes. The chassis number settles the generation, the body and usually the engine in seventeen characters — it is on your mulkiya. A photograph of the old part helps where there is more than one version.

Battery packModules and cellsCoolant plates and linesBattery managementContactorsFuse and service disconnectHousing and underbody shield
High-voltage battery — schematic, to show where the part sits. Arrangement is right; it is a diagram and not a fitment reference.

Rest of the traction battery

All high-voltage battery & charging parts
Get in touch

High-voltage fuses and service disconnect for your Mercedes-Benz?

Send the chassis number and a photograph of the old part. We come back with genuine, OEM and aftermarket options priced side by side, with lead times.

Mon–Sat, 8:00 AM – 6:00 PM · +971 54 303 3119 (Operations Director) · +971 54 241 0599 (Managing Director)