The 1990-1993 300D, with the 2.5L OM602.962 engine, has the lovely vacuum-operated wastegate, which is controlled by the computer system (EDS). Due to various reasons, I want to convert this to the good ol' pressure-operated wastegate actuator, like on the older OM602.961 (used in the 1987 190D Turbo). Both cars have the Garrett TB-025 turbocharger.

I have a spare actuator from a T3, but I've been told it won't fit the TB-025... and sure enough, it doesn't (the T3 canister is significantly larger). So... does anyone know where I can obtain a pressure-operated actuator for the TB-025? I emailed a half-dozen suppliers of Garrett parts, and so far none have replied. (Update below.)

Also, if anyone can provide the nameplate data from the older 190D-T turbo used on the 602.961, that would be very helpful.

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