The junkyard computer shows that the following are interchangeable:
230/4 '74-76 115 f
240d '73-76 115 f
240d '77-83 123 f
300d '75-76 115 f
300d '77 123 f
300d,cd '78 123f
300d,cd 123 r
300dd,cd,td '79-82f
300d,cd 79-85 123r
Wouldn't it be great to have access to that data base?
When I was a kid the junkyards had Hollander Parts Interchange books. Google
found this about Hollander;
"The Federal Trade Commission today charged that Automatic Data Processing,
Inc.'s 1995 acquisition of AutoInfo, Inc. assets created a monopoly that has
raised prices and reduced the quality of service in the automobile salvage
yard information management industry. The FTC said it is seeking an order
that would require ADP to divest businesses and assets sufficient to restore
competition to the industry.
ADP, based in Roseland, New Jersey, had $3 billion in revenues in 1995."
Check out the way they market info at Hollanderinterchange.net.
It's probably not safe to extrapolate Bilstein/Mercedes shock compatibility
from various web parts sites that show KYB front numbers being the same for
the 240d and 450sel (but only with the small v8).
In this case it doesn't seem to matter since I couldn't get a wrench on the lower inside bolts or read part numbers, the yard couldn't determine the engine size and the vin is 3 characters short of 17. "In the early 1980s, the National Highway Traffic Safety Administration began requiring that all road vehicles contain a 17-character VIN." (autohauzaz.com)
For ducatipaso...some people reading this forum probably already know about the good stuff you can find in junk yards. I've seen cars there with a recent set of tires or shocks or maybe a new battery that somehow end trashed.