Its been 3 weeks since replacing the $90 remanned alternator ,yesterday It failed.Today I went the the local Oreilleys and the guy at the counter gives me the news that I was sold the wrong alternator.He shows me on the screen the right one ,but right above it is the cheaper unit.He doesnt explain why this one is offered just that its the wrong one,the right one cost $125 and will be installed sat.Ive been round and round with the alternator issue on another car ,this guy seems to have found the reason .I still have no answer on why they offer this cheaper alt. if its not up to snuff for the mb diesel car.