2003 mercedes does not make a sound when key is turned
DTR SRS ABS on 2003 Mercedes-Benz C240 4MATIC

a triangle sign with an exclamation mark appears, check engine light on, DTR, SRS ABS light are on. Suddenly happened. Radio and head and tail lights are okay.
Can you tell what all this means and is the car worth fixing?
Thank you

when you turn the key on most cars all the lights pop up, on my toyota the same thing happens