xkcmdmb

I tried unclipping the the pyrofuse from its mount in the prefuse box near the battery. It is very hard to get it off. just pull up? Any trick or tool for this? I am afraid to cause damage to the prefuse box

2012 C300 4matic

Update on 12/4/2018: The squib parts number is 204-440-55-07. The reason to replace is instrument message "Airbag Malfunction". Test with iCarsoft MBII shows "B273513, The Squib for pyrofuse 'on-board electrical network line' has a malfunction. There is an open circuit".

Thanks for MBtech764 to provide the following method:

to disconnect that squib, take a pocket screwdriver and pop the orange part up a few mm, that's the locking tab, don't fully remove it. Once that's unlocked then just wedge off the connector from the prefuse.

You can get a little rough with it, just don't break it.

TheDurk

You need to cut the wire tie at the bottom, then I think you can pull it some, where then you have to cut another wire tie. Pull it some more. Then you can start undoing the connectors.

The clip was a pain. It only comes off one way, and it was not what you would expect, but I forget if it is to separate clip from body or clip from fuse box.