very strange problem with 2006 C200 CDI
 

hello!
as the title says, i drive a 2006 c200 cdi.
today i have witnessed a strange problem which i've never seen before.
i came to the car and i saw the the gages backround light is on and the purple light on the gages which indicates the high beam lights is on also - the key is not in the ignition. when i put the key in the ignition, and turn the switch on, these errors appear:
SRS faulty
Brake fluid level is low
desplay faulty

all the other lights on the gages then turn on and it seems normal, but the car don't start. i take out the key, but the gages backround light is still on and the purple high beam indicator is on too.

i removed the (-) from the battery for a minute, and it reseted the all thing. only then it all came back to normal and the car started as usual.

the second time it happened a week ago and the car was towed to the garage. some say the problem is in the SAM module, others say it's the ECU or the instruments.

WTF was that? did anyone see that kind of problem before? i just want to know if this is common problem or just one time flop.

thank you all!