Where is the power steering reservior in the ml320-2002?

it is located on the drivers side front of the engine. it has a black coveron it. you will have to move the engine cover to accessit. if you are loosing fluid or the pump is loud this may be caused by a bad lower p/s hose. that is located on the drivers side on the raddiator support. you will see 2 hoses there the top one goes into the pump reservior,the lower one usually leaks. if this is the case you can take it to the dealer it will be repaired under warranty. i work for the dealer.