Coffee tastes weak or watery even when using the same beans and settings.

Safety first: Unplug the machine before adjusting internal grinder components.

• Adjust grind finer: Turn the grinder adjustment towards a finer setting while the grinder is running (follow the Grundig manual).
• Increase coffee strength: Use the strength or aroma setting to increase the dose if available.
• Clean brew group: Remove and clean the brew group to ensure it can compress the coffee puck correctly.
• Run calibration (if available): Some models allow recalibration of coffee volume. Reprogram cup sizes to slightly smaller volumes for stronger coffee.