This is a follow-up to complaint #10579528. spoke to robin, customer service representative at mercedes benz corporate headquarters in the united states. they refuse to acknowledge a design flaw in the rear signal actuator module as the basis for the fuel delivery failing while driving the car. the explanation they offered is that the likely cause of the failure in fuel delivery to the engine, while driving, is the fuel pump, mercedes part# 203 470 3794. however, they further explained that the only way to replace a faulty fuel pump is to replace the entire fuel tank, fuel delivery unit, fuel sending unit and wiring harness ...the entire fuel storage tank and fuel delivery system! no one i know has ever heard of a situation where an entire fuel system has to be replaced because of a failed in-tank fuel pump. this points to yet another design flaw for which mercedes benz, the automobile manufacturer,hold itself accountable. what possible engineering reason can they offer other than the fact that the fuel and electrical fuel delivery components system were seriously flawed from the beginning of production? *js