This is what is happening to me. I own a 500CLK 2004 convertible since 2010 (100K mile).
Last week, the car suddendly refused to start when I turned the key. No noise, no nothing. After investigation, Mercedes Miami told me a control unit has to be changed for $2500... I didn't change it and for one week, I managed to start the car by installing a switch connected directly on the starter (through the fuse box).
Worked fine for one week.
Then one morning, I started the engine, put the gear lever on R, moved the car, then put it on D, moved the car again until the gate and THEN when I reaccelerated the car refused to move (check engine light went ON).
So, back to the workshop, a small one specialized in Mercedes, in Miami (not Mercedes Miami...).
I'm posting below what came out. A couple of error codes. The guy tried to change the TCU and was able to drive a couple of blocks, then the car stopped moving again.
I DON'T KNOW WHAT TO DO and need your experience and opinion.
Do I change the transmission + converter? ($4800)
Just the converter ? ($2000)
Or... do I TRASH the car???......
Really, I need your help!