did you adjust the valves at all?
the turbo noise could be a bearing.
To pin point where the noises are coming from you should get a stehoscope at your local autozone.
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1986 300SDL, 211K,Dealership serviced its whole life
1991 190E 2.6(120k)
1983 300D(300k)
1977 300D(211k)
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