This is how you reset service light on a Mercedes-Benz A-Class W169 (2004 – 2012).

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STEP 1: turn the key in the second position

STEP 2: press quickly 3 times on the left buton on the cluster (you should see the “UB” on display)

STEP 3: go to “SERVICE DATA” pressing one of the arrow buttons on the steering wheel

STEP 4: go to “Confirmation” using “+” or “-“ buttons on the right side of the steering wheel

STEP 5: press the left button (menu button) on the steering wheel to select “Confirmation”

STEP 6: select “Full service” from the display menu pressing the left button (menu button) on the steering wheel

Wait until “Service confirmed” message appears on display.

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