How to test the turbo?

[northwichita]

Vehicle is '85 300 TD (wagon) Turbodiesel sitting in one of those donated car lots. Price $1000. I was allowed to drive it around the large lot only. It started okay, but accelerated slowly (without being in gear). In gear it seemed to accelerate slowly, I could floor it for about 2 seconds and I'm sure no one noticed. It did shift into second gear. Body borders on salvage yard , some rust, definate paint job needed, chrome is flaking off....
How do I determine the running condition of the turbo? I never heard any turbo whine, even when turning off the engine. Should I? . The pluses; no dark exhaust smoke at all and mileage at 137k .
A bad turbo is just not something I want to deal with. North

[DebSol]

These aren't the fastest cars on the planet, so don't be wary of the slow acceleration. The turbos are durable, but to really test them, you need to install a boost gauge and load the engine to see what it's doing. 1k for what seems like a rusty Benz is no deal, if you ask me.

[northwichita]

I did pass on it. I went by the lot last week and it was gone, fine by me. I looked around for the answer on the net about testing the turbo, I seem to recall reading a bad turbo generally will leak oil through the seals, so alot of black exhaust could be from a leaky turbo. I was hoping for an easy check that didn't require tools. I suppose most cars would have a turbo boost guage. (This one didn't).