Be aware of the fact that 300TD (wagon) started using turbo in 1981 but 300D was in 1982.

Both 1984 and 1985 Calif 300D/SD have a simple comupter controling the smog devices that makes the cars have slower take-off than the early year. It is worst in 1985 California due to an addition of the trap (now replaced by a trap looking device called Catalyst).

The good things about 85 300D/SD Calfornia are:
1. There is more room for fixing a leaking turbo oil return tube under the turbo.
2. You do not need to remove the air filter housing before changing the battery.
3. Since the air filter housing is a new design which does not have the problem of breaking mounting stubs the old design has.

The bad things:
1. Air filter is expensive.
2. Starter is hard to find. If you do find it, in most cases, it is expensive.
3. The Catalyst (trap replacement) can clog and it is a $700 job, part and labor.

David