The power steering return hose may leak at the radiator cooler fitting. If the clamp is not properly tightened, the hose can blow off, causing increased steering effort and a mess under the hood.Google+
Car Problem Reports
Mercedes-Benz ML350 Power Steering Return Hose May Leak at Radiator Cooler Fitting
Mercedes-Benz ML350 Problem
Average Mileage: 86,800 mi (44,000 mi - 150,000 mi)
Visitor, 2005 Mercedes-Benz ML350, 83,000 mi
Power steering return line leaking on the radiator side
Visitor, 2004 Mercedes-Benz ML350, 65,000 mi
Hose blew off with no warning. Fluid everywhere. Even though there is a known recall for this issue, I'm not covered.
Visitor, 2005 Mercedes-Benz ML350, 44,000 mi
The hose blew off, dumping fluid everywhere. Luckily, I was stopped and turning into my driveway. I don't want to think about it if this happened when I was cornering at high speed! My service consultant told me that the hose blew, spewing fluid over the belts. The hose and belts need to be replaced, with labor $1000! I asked what would cause a car that is serviced yearly by them and garaged most of the time to do this. His response, we can't xray the hoses and have no way of knowing the integrity on the inside! I am wondering if this is another Mercedes defective part issues that they don't want to deal with?