Lowering dampers need advice diff length




factory all 4 same length but new ones 2 are one length 2 others are a bit shorter. Do I install the shorter front or rear?Just adding got lowering springs woks but factory dampers got a lot of miles on their back time.
I asked seller but got a wait for weekend ends and was hoping somebody can answer this for me. I'm 50% certain long goes rear and the short ones goes front. Nut again not 100% sure
Thanks for reading.
Nb CLK 320 W208 YEAR 2000


