EL-34

I tried to use my radar detector and it won't power up from this supply.

MBguy013

Without looking in the owners manual, I'm assuming the ignition must be turned on. Was it? If not, maybe it's the plug on your device, or possibly the vehicle. I had a USB cigarette lighter plug that didn't work well unless you jiggled it

EL-34

Yes the car was running when I tried.

BlueYonder

Some of the plugs are too deep to make a connection.

https://g05.bimmerpost.com/forums/sh....php?t=1861313

GregW / Oregon

I think you mean the plug in not deep (long) enough.

djer

Fuse? My W204 blew it twice already for some reason.

Sigp232

When I bought and picked up my car S/A told me cigarette lighter power has only enough power to use a cigarette car phone charger that’s it. Anything else bigger that needed more power would blow a fuse,

GregW / Oregon

This is more than a phone charger:

Sigp232

Interesting. I should have read the whole manual instead of listening to S/A. Thx Greg