Parktronic for W211

[cocacola]

Does anyone have the correct part number for the parktronic sensors kit needed for a 2007 W211 E Class?

I rang up two garages today and was given two different part numbers

B67823812
B67823401 / 3403

which one is it?

 

[cocacola]

Had a phone call from MB retail this morning, apparently Mercedes do not have a Parktronic kit for the W211 from 2006 on wards and will not be in the foreseeable future as the new E class is out this year summer.