MercBzC240

Hello so once again i'm working on the GFs car.

Here's the deal:

My buddy loosened the pos terminal of the battery. It didn't come off but it was definitely loose.

Next I tightened it back up and removed the neg first.

waited 10 min then re connected.

Now for the fun

Had two issues one of which is fixed.

The big bad " Visit workshop Display Faulty" with a "!" and circle, indicating electrical ?

Anyway I tinkered around and came up with this

The hazard lights function isn't working, neither do hte turn signals. To be clear when the signal is pushed up or down "NOTHING" happens, no signal light on the dash no lights on the car no clicking at all.
Also the power seats fail to work.

So I took out my handy dandy test light and came up with: No power on fuse 1 or 2 or 10 from the rear fuse panel.

I haven't gone as far to see where the signal stuff is located but i'm assuming its on the same panel.

What causes no power other than wire melting? or bad ground?

I looked into the "SAM" stuff and its likely it could be that but what can i Do to test for all of this before whipping out the wallet

Thanks in advance.

Regards Rylan

MercBzC240

Not even one reply?

WaveyKat

hey your best bet is to have the car TESTED with a DAS computer that way you wont be changing unnecessary parts. it will point you in the right direction

Holmes5518

Unplug your radio head unit and see if everything goes back to normal.

MercBzC240

And if it does ? ? haha

Holmes5518

So it worked? Then replace the radio. When the stock radio goes bad it can cause extremely odd interior CAN issues. I've seen it a bunch of times.

MercBzC240

No unfortunately it didn't work
but this looks useful

https://mbworld.org/forums/c-class-w...repairing.html