I could hear the turbo in my 1979 W116 300SD, which had great pickup. It was a whistling noise. At freeway speeds the engine was totally silent and there was a faint whistle of the turbo.

My 1980 w116 300SD is slower and I never hear any turbo noise. When I'm accelerating the engine roars. When I am on the freeway there is a lot of engine noise; it sounds like a roaring or grumbling. It lacks the power my 1979 had.

I take it this is because the turbo is dead. I think that the turbo is supposed to quiet the engine noise and produces a whistling sound. I liked my 1979 300SD because at 75 MPH it sounded like a jet.

__________________
Stop paying for animal enslavement, cruelty, and slaughter. Save your health and the planet. Go vegan! I did 18 years ago. https://challenge22.com/

DON'T MESS WITH MY MERCEDES!


1967 W110 Universal Wagon, Euro, Turbo Diesel, Tail Fins, 4 Speed Manual Column Shift, A/C
1980 W116 300SD Turbo Diesel, DB479 Walnut Brown, Sunroof, Highly Optioned, 350,000+ Miles