Can anybody elaborate the difference in suspension between E420/400E and E320/300E?

It looks like almost all part numbers are the same, maybe sway bars is different?

I changed rear shocks on my 400E, the Bilstein shocks I got were the same as those for 300Es,

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99 BMW 540i 6-speed 110K Km
03 SAAB 9-5 wagon 80K Km
92 400E (Sold) 245K km
Still missing the days with the Benz, it kept me busy.