Diagnosis of faulty automatic transmission selector Mercedes W203
* Identify symptoms such as difficulty shifting gears, getting stuck in park, or lack of response when shifting gears.
* Check the condition of the shift cable for breaks, fraying or binding.
*Run an on-board electronics diagnostic using the diagnostic tool to identify error codes related to the gear shifter.
* Check electrical connectors for corrosion or damage.
Replacing the selector of an automatic transmission Mercedes W203
Tools and materials:
* New gear selector
* Set of keys or screwdrivers
* Funnel for filling transmission fluid
* Transmission fluid (AT)
* Contact cleaner
Instructions:
1. Disconnect the battery. Disconnect the negative cable from the battery.
2. Remove the center console cover. Remove the shifter cover and then remove the surrounding center console trim panel.
3. Disconnect the selector connectors. Identify the connectors connected to the gear selector and disconnect them.
4. Remove the gear selector. Loosen the mounting bolts holding the gear selector under the console and remove it.
5. Install a new gear selector. Align the new selector and install it in place, tightening the mounting bolts.
6. Connect the connectors. Connect the connectors to the new gear selector.
7. Install the center console cover. Install the trim panel and shifter cover.
8. Fill with transmission fluid. Add transmission fluid to the required level using a funnel.
9. Connect the battery. Connect the negative cable to the battery.
10. Reset the transmission adaptation. To do this, use a diagnostic tool (Star Diagnosis).
11. Run the test. Start the engine and shift through all gears to check the operation of the gear selector.
Adviсe:
*Before starting repairs, make sure that the problem is with the gear selector and not with other components such as the transmission control module or the transmission itself.
*Use genuine Mercedes parts or high quality replacement parts.
* Be careful when handling electrical connectors and wires.
* Check the transmission fluid level and add it if necessary.
*Resetting the transmission adaptation will reset the transmission and allow it to re-adapt to your driving style.