How do you push back piston on your brakes on Mercedes ml270?

To push back the brake piston on a Mercedes ML270, first, ensure that the brake caliper is removed and the brake fluid reservoir cap is loosened to relieve pressure. Use a brake caliper tool or a C-clamp to gently push the piston back into the caliper housing. Be cautious not to damage the piston seal, and check the brake fluid level, adding fluid if necessary. Once the piston is retracted, you can reassemble the caliper and brake components.