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W168 (1997-2004)
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  • Battery — Removal and Installation

Battery — Removal and Installation (Mercedes-Benz A-Class W168)

0
Contents: Removal ↡ Installation ↡
The battery is located in the front passenger footwell under a cover, next to the main fuse box.

Caution! When the battery is disconnected, data is deleted from the memory units of the following systems:
  • memory unit of the self-diagnostic system, where faults of various systems are recorded;
  • the code is deleted from the radio receiver with an access code that prevents its unauthorized use, as well as the radio station settings. Therefore, before disconnecting the battery, you must make sure that the code is written down and can be re-entered into the radio receiver after connecting the battery. If the code is unknown to the car owner, then only a specialized workshop or its manufacturer can put the radio receiver into operation.

Attention! As of 02/04, radio receivers with a security code may only be put into operation by a qualified workshop.

Warning! Batteries contain toxic components and should not be disposed of in household waste. Old batteries should be taken to special recycling points.


Removal



1. Disconnect all on-board electrical system consumers and turn off the ignition. This ensures the safety of the electronic control units.

2. Remove the cover that covers the battery in the footwell on the passenger side. The cover is secured with a twist latch with a folding handle 1 (see illustration).

2. Remove the cover that covers the battery in the footwell on the passenger side. The cover is…


3. Remove the terminals from the battery terminals. First, terminal 2 of the ground (-) wire is disconnected, and then terminal 3 from the positive (+) pole. The terminal of the ground (-) wire is secured to pole 4 with a clamp bolt, and terminal 5 of the positive potential wire 3 is covered with a cap (see illustration 12.2).



4. Using a socket wrench with an extension handle, unscrew the two bolts 7 of the battery clamp (see arrow in illustration 12.2) and remove the bracket.

Attention! If the battery is not removed from the tray, then after disconnecting the terminals from its poles, insulate the poles to avoid short circuit.


5. Before removing the battery from the tray, disconnect the gas outlet hose 6 on the side of the battery (see illustration 12.2).

6. Remove the battery from the plastic tray, being careful not to damage the electronic components.

Installation



7. Before connecting the battery, make sure that all on-board electrical consumers are disconnected and the ignition is off.

8. Place the battery in the tray. Make sure that the central gas outlet hose 1 is not pinched (see illustration 12.9).

9. Install and secure the clamp 2. The flat side of the clamp should be pressed against the battery case (see illustration).

9. Install and secure the clamp 2. The flat side of the clamp should be pressed against the battery…


10. Tighten both 3 clamp mounting bolts. The tightening should be sufficient to hold the battery in the tray, but the clamp should not press into the battery case wall (see illustration 12.9).



11. First connect the terminal of wire 4 to the positive (+) terminal, and then the terminal of wire 5 "ground" (-) to the negative terminal 6 (see illustration 12.9).

12. Connect the central gas outlet hose 1 to the battery (see illustration 12.9).

Caution: An incorrectly connected battery can cause serious damage to the generator and the electrical system as a whole.


13. Enter the access code into the radio receiver and set it to automatically receive radio stations.

14. Adjust the power window unit by lowering and then raising the windows. After closing the windows, hold the switch down for about one second.

15. Set up the electronic clock.
This article is available at: russian, bulgarian, belarusian, ukrainian, serbian, croatian, romanian, polish, slovak, hungarian
The article has been verified: Lukyanov Nikita Ilyich
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A-Class W168 / Power devices
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Checking the generator voltage
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