The access to the suspension knob is behind the left side cover, to the rear of the battery. To take the seats off, push against the padding on the rear seat, near the corners and you should see 2 bolts requiring an allen key to remove. Remove them, slide the rear pillon slightly back and lift out. The main seat also has 2 allen key bolts accessed by pushing the padding near the corners. If you check the compartment under the seat, you may find the owner's manual.