Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to change spark plugs in a renault clio mk3 [title] Park up your car on level ground and wait for your engine to cool down. [step] If the engine is already cool you can begin work on your car. [title] Disconnect your car battery.

Ending1: [step] Make sure your battery is disconnected before performing any work on your electrical system. You don't want a shock or even worse to fry your on board computer because of a shock. Ending2: [title] Plug your battery in and immediately unscrew your heater release. [step] Sometimes this is necessary for removing heat...sometimes, it will need to be replaced. Ending3: [step] You can do this by pulling off your battery and draining off any excess water that might accumulated. [title] Using your finger, place the replaced battery on top of the newly released spark plug. Ending4: [step] Use the electrical test line that says " fuse tools..." to check if battery power is healthy for running in your vehicle. If you think you have negative electrical surges and a failing spark make sure your battery is safe for operating on the ground.

Answer format: ending1/ending2/ending3/ending4