ok, I'll have a go.
Welcome to the forum.
What engine are we talking about? 300tdi, TD5, etc.
If TD5, there are 2 types. The second type (Euro IV? ) has a water cooled exchanger, which can be blanked off - is this what you are talking about?
The EGR system takes its vacuum from the brake servo, so the T connection to the EGR actuator need to be blanked off, or replaced.
On the TD5, you can unplug remove the actuators and lines to the brake servo and air filter, providing the brake line is correctly blanked off.