Don't over pay for expensive dealer Nerf bars. The Aries 3 inch round Stainless Steel side bars for the Mercedes GL450, ML320, ML350, ML430 and ML500 are stylish and affordable. The plastic step pad is a safe spot to place your foot while entering and exiting the Mercedes. Aries has designed these side bars to mount to factory holes for easy installation. The 304 Stainless Steel is polished to a mirror like finish to sparkle even in the light of the moon .