Possible causes of kicks in the gearbox of the Mercedes-Benz W210 automatic transmission:
1. Low or contaminated transmission fluid (ATF)
* Insufficient or contaminated ATF can lead to insufficient lubrication and increased wear on transmission components, resulting in kicking.
2. Worn or broken solenoids
* Solenoids control the flow of ATF inside the transmission. Worn or damaged solenoids can disrupt this flow, causing harsh gear changes.
3. Faulty Transmission Control Module (TCM)
* The TCM controls the operation of the transmission. A faulty TCM may send incorrect signals, resulting in kicking.
4. Mechanical wear
*Transmission components such as gears, bearings and shafts can wear out over time. This wear can lead to noise, vibration and kicking during gear shifts.
5. Faulty engine or transmission mounts
* Loose or damaged engine or transmission mounts can allow the transmission to move too much, resulting in kicking when changing gears.
6. Dirty or clogged transmission filter
*A dirty filter can restrict ATF flow and cause transmission kicking and other abnormal behavior.
7. Spark plugs or ignition coils
* In some cases, malfunctioning spark plugs or ignition coils can cause engine problems that indirectly lead to transmission kicking.
Troubleshooting:
* Check ATF level and condition. If necessary, replace or add ATF.
* Replace any worn or broken solenoids.
* Diagnose the TCM and replace it if necessary.
* Inspect and, if necessary, repair or replace worn mechanical components.
* Check and tighten engine and transmission mounts.
* Replace dirty or clogged transmission filter.
* Check and replace faulty spark plugs or ignition coils (if necessary).
Important: Kicks in the automatic transmission may be a sign of a serious problem. It is recommended that you contact a qualified mechanic for diagnosis and repair as soon as possible. Delaying repairs can result in further damage to the transmission and costly repairs.