Car don't crank or run

I got 1999clk320 mercedes-benz n don't or run crank and the batteries are new and the stater is new. I did a test and put a remote starter cable on the stater the engine crank but did not run while cranking the engine I test for spark on the sparkplugs no spark I put a test light on the fuel injections the light only stay on while cranking no blink. The fuel pump work is good. But the engine don't run or whit the ignition switch. I need help