Have been doing some welding on my X300 and now most the electrics don’t work. I have interior lights, side lights, electric windows but nothing much else. Any suggestions appreciated.

 

What kind of welding other then where it was at ?

 

After some research I was pointed towards inertia switch. Sure enough my hammering had tripped it. Once reset everything works perfectly. If none of your electrics work, that would normally work when the ignition is on then check the inertia switch as it seems to kill the ignition feed. To check inertia switch just push down on the top of the rubber top and if tripped you will hear and feel a click. Hope this helps someone else one day.

 

Excellent find, and thanks for reporting the fix!