How to Replace the Auxiliary Battery in a Mercedes-Benz C200L?

[LeAshlyn]

Here are the detailed steps for replacing the auxiliary battery in a Mercedes-Benz C200L: 1. Prepare the tools and new battery: You will only need pliers and a screwdriver for the tools. The new battery must meet the vehicle's specifications. Batteries are generally divided into maintenance-free and dry-charge types. 2. Disconnect the negative terminal first, then the positive: Since the battery's negative terminal is connected to the vehicle body, disconnecting the positive terminal first could cause a short circuit if the metal tools accidentally touch the body. Also, remove any other connected vehicle electrical wires. 3. Loosen the clamp bolts: Remove the battery clamp bolts, then the clamp and the battery itself. If there is any insulation material around the battery, remove it as well. If the bolts are rusted and difficult to remove, apply some rust remover. 4. Removing the battery: Tilt the battery no more than 40° to prevent electrolyte leakage, especially for dry-charge batteries. Wear gloves and avoid getting electrolyte on your skin or clothes. 5. Clean the terminals: Battery terminals exposed to air for long periods can develop oxides or sulfates. Clean them with fine sandpaper, then apply petroleum jelly to prevent future corrosion. 6. Install the new battery: Place the correctly sized battery in its holder, connecting the positive terminal first, then the negative. Tighten the screws securely to prevent vibration damage during driving, which could shorten the battery's lifespan. 7. Insulate the battery: Reconnect any other electrical wires, such as the audio system. Pay special attention to insulating the positive terminal—if left exposed, it could cause a short circuit. The final step is to cover the positive terminal with its rubber cap to isolate it from other metal parts.