They might have published an SAE Paper on the project which might have included the model data.
Mercedes would be sending some of their staff to each SAE/ISO congress and there's a chance that they shared the info.
Renault mailed me a press kit for the Vesta II and in it was a paper about their research.
They'd achieved Cd 0.135 with a development model at the time of printing and expected to be at Cd 0.10 by 2000.
Subaru was at Cd 0.088 in 1986 with there model 'G' wind tunnel model for the XT development.
So come to think of it,maybe Cd 0.095 isn't so implausible.
Neil,I may owe you dinner! Which would be a pleasure anyway.