I have a Bosch number 0 438 100 099 new old stock fuel distributor. Found site that says it fits 89 lamborghini Countach (25th Ann) and 1980-81 mercedes 280E, 280 CE. Also it should interchange with Bosch 0 438 100 040.
This probably sold for more than $2000 USD at the dealer. Rebuilt ones are $ 489.95 with core exhange at this site
http://specialtauto.com/fuel-distributors.html. I was going to place this on ebay but thought I offer an outright sale for $200.00 the core price if interested we can do a buy it now auction. Have good feedback my ebay account is 80chevybeater. I only have the one don't have two. I am also posting on mercedes forum. Bought for my 78 280CE mercedes but it didn't fit it wrong year. Never had gas through it. Still has caps.