Mercedes Gearbox Basic Adjustment

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Gearbox Basic Adjustment

What it does

• Performs basic adaptation of the automatic gearbox
• Resets and relearns clutch and shift parameters
• Ensures smooth and correct gear changes

When it is required

• After transmission repair or overhaul
• After gearbox control unit replacement
• After oil and filter change (on certain models)
• When shifting is harsh, delayed, or irregular

Conditions that must be met

• Transmission oil at specified temperature
• Vehicle stationary
• Parking brake applied
• Ignition ON, engine running (as instructed)
• Stable battery voltage
• No active critical transmission fault codes

What happens during adjustment

• Gearbox performs controlled clutch engagements
• Shift pressures and timing are learned
• Adaptation values are stored for:
• Gear changes
• Clutch control
• Torque management

If adjustment is not performed

• Rough or delayed shifting
• Increased wear of clutches
• Transmission fault codes may appear
• Reduced driving comfort

After adjustment

• Perform test drive following adaptation guidelines
• Monitor shift quality in live data
• Confirm no gearbox warning messages remain

Coverage in StarCOM