An adjusting element for an air guiding element of a motor vehicle, wherein the air guiding element (2) is adjustable in its position relative to the motor vehicle (3) between a first position and a second position, wherein, for adjustment purposes, the adjusting element (1) is operatively connected to a kinematic
system of the air guiding element (2), and wherein the adjusting element (1) comprises a
servomotor (4) and an adjusting shaft (5), which is operatively connected to the kinematic
system, which are at least partially accommodated in a housing (6) of the adjusting element (1), and wherein a gear (9) is formed between the adjusting shaft (5) and the adjusting motor (4), wherein the gear (9) has at least one
gear wheel (13; 15) which is rotatably mounted in the housing (6) by means of a bearing shell (16), characterized in that, in order to reduce play in the gear (9), the bearing shell (16) is accommodated in the housing (6) in an at least partially axially movable and at least partially preloaded manner,wherein the
gear wheel (13) is slide-mounted, and wherein the bearing shell (16) comprises a first bearing
shell element (17) and a second bearing
shell element (18), wherein the
gear wheel (13) is arranged between the first bearing
shell element (17) and the second bearing shell element (18), wherein the first bearing shell element (17) or the second bearing shell element (18) is accommodated in the housing (6) so as to be axially movable, and a spring element in the form of a compression spring is designed for prestressing, which spring element is designed to exert an
axial force (19) on the first bearing shell element (17) and presses the first bearing shell element (17) against the first gear wheel (13), and wherein the gear (9) is a two-stage gear, and wherein a secure positioning of the air guiding element (2) is supported by an efficiency-optimized gear (9), which is characterized in particular by an increase in the
frictional resistance of at least one of the two gear stages (10, 11). becomes.,