P2 codes are model specific.

P0 001 on a 2001 E430 is for the EGR chain.

If you pull vacuum on the EGR valve does it almost stall the engine?
Since you put a new valve on the engine, the tube is most likely plugged.

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator