Thanks for replying. I'm having trouble finding parts even though Mercedes dealers ,even with part nummber s i have taken on board your advice about engine and might get engine overhaul or replacement engine though engine suppliers i am to be onest struggling, once again thanks for your reply regards ianGood Morning,
I think the best thing to with your steering box is to go to your local Mercedes commercial dealer the parts required and chassis number to price up the items required.
As to the engine unless you can hear it running and it has water in it buyer beware. The engine should be the same but check the crankshaft fitment, and if fitted the injection pump may have electronic idle control fitted. Also if looks as if its been sitting in a field then walk away could be full of water.
Hope this is of help.