Whoever can help...

I have a 1987 W124 300TD Turbo Diesel (wagon). It has about 40K milage on it. I just had the diesel pumps re-calibrated about 2 months ago and it was working fine. Then i noticed that there was oil seeping out through the intake manifold from the turbo. (from the gasket connecting the turbo pressure to the intake manifold. The gasket is small and rectagular, about 2.5 inches high and about 4 inches long.) Sad really...

It performs quite well and the turbo kicks in fine at about 2500 rpm. Is my suspission right that the turbo has already given way and needs replacement? or is it only the oil seal inside the turbine?

Also, if anyone knows what Mercedes Benz uses for its turbine? Brand and model? (particularly for the 1987 300TD) is there a turbo repair kit available for my car?

Any help would be appreciated. Thanks!