Where is the jump-start terminal located on the Mercedes-Benz S400?
3 Answers
Mercedes-Benz S400's jump-start terminal is located under the protective pad on the right side under the hood. It is recommended that owners do not attempt to jump-start the vehicle themselves and should seek professional maintenance personnel. The Mercedes-Benz S400 is an S-Class sedan under the Mercedes-Benz brand. The front part follows the family style changes, featuring a larger and more sharply contoured radiator grille. The rear part replaces the body-color trim on the taillight assembly with a full LED light group, combined with the design of the reverse light group to provide better lighting effects for the rear. The hybrid version of the Mercedes-Benz S400's engine, like the THS, operates on the Atkinson cycle, altering the intake valve timing to close faster than the original S350, achieving a compression stroke shorter than the power stroke. This utilizes the Atkinson cycle principle to achieve higher thermal efficiency.
When my Mercedes-Benz S400 had a dead battery two years ago, I tried jump-starting it. The positive terminal is located on the inner side of the engine compartment near the right side of the windshield, marked with a conspicuous red plastic cover and a plus sign. The negative terminal can be connected to a nearby engine bracket or any metal frame. The designer intentionally placed this point outside because the battery might be under the trunk, avoiding the hassle of opening the trunk and reducing the risk of short circuits. Remember to turn off the engine and power before jump-starting, and wait a few minutes after connecting the cables before starting to prevent power surges from damaging electronic components. During regular maintenance, I occasionally check that area to ensure it's clean and free of debris, as it's prone to dust accumulation outdoors.
Opening the hood to locate the jump-start terminals on a Mercedes S400 is quite straightforward. The positive terminal is on the left front side near the battery, easily identifiable by its red cover—never tamper with the main battery in the trunk directly. Connect the negative terminal to a metal part of the car body, such as the suspension. I recommend ensuring the car is not running and avoiding reverse polarity connections to prevent damage to the control systems. This design facilitates quick and safe emergency assistance, with the engine bay operation being both convenient and resistant to moisture corrosion. Regularly cleaning dust around the cover helps prolong the contact points' lifespan.
