Well I did some checking with FSM.
It looks like I do indeed have the wrong springs. Contrary to what I believed the "points system" applies to springs and not to pads.
The spring I have is 126 321 18 04.
The base point value for the 420SEL is 48. Add 2 points for the sunroof and you've got 50.
50 points to spring 126 321 17 04. Now based on some color code thing that I am not quite sure on, it can use either a 18mm or 23mm pad. SINCE my old springs were the 17 04 springs and they had the 23mm pad..I can assume I will be safe with the 23mm pad once again.
Additionally you can see in the chart below the 18 spring is slightly taller, slightly stiffer and has thicker coils.
Where I went wrong was just checking the EPC which said, yeah the 126 321 18 04 is compatible with all 126 front ends. This, technically, is true however you have to apply the point system.
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