Instructions:

Articulator: back of the tip of the tongue

Point of Articulation: alveolar/postalveolar/palatal area

Manner of Articulation: Lateral Approximant. Make a firm contact against the point of articulation, so that the airflow is blocked in the midline of the oral cavity. The airstream escapes laterally through the space between the upper back teeth/gums and one or both sides of the tongue. The constriction degree between the tongue and the teeth/gums is not so narrow as in a lateral fricative.

Voice: voiced – Vocal folds are close and vibrating.

Occurrence:
Enindhilyagwa, French (Standard), Kannada, Kahanty (Eastern dialects, some northern dialects), Malayalam, Norwegian, Punjabi, Swedish, Tamil, Telugu.
(Source: https://en.wikipedia.org/wiki/Retroflex_lateral_approximant#Occurrence)