How can I find the problem for no fuel getting to engine? on 2000 Mercedes-Benz S500

I replaced the fuel system relay and there's still no fuel getting to the engine. What is my next step to troubleshoot this problem?

by in Galveston, TX on March 21, 2012
1 answer 1 comment
ANSWER by on March 22, 2012
test pwr to the fuel pump then test fuel pump
COMMENT by on March 22, 2012
How do u test the power for it? What, if any, tools are needed to test it? Thank you kindly.