Centering device for longitudinal elements and a resetting device for motor vehicles

An adjustment device comprising:

• a console having a maneuvering device disposed therein, said maneuvering device adjustable between different positions;
• a positioning-retaining device for moving and securing said maneuvering device in and between a plurality of predetermined positions, said positioning-retaining device comprising:
• a holder associated with the elongate element and having a first end, a second end, a cavity extending therebetween, and a longitudinal axis extending from said first end to said second end, said holder further including a seat positioned proximate said first end;
• a casing having a first end, a second end, and a abutment disposed proximate said first end of said casing, said casing being positioned with said abutment of said casing adjacent said seat of said holder, said casing being biased toward said second end of said holder such that said abutment tends to apply pressure said seat of said holder, and
• a pin having a shaft and a head, said shaft being positioned within said casing and said head being positioned proximate said guiding surface of said retaining part, said pin being biased toward said retaining part such that said head of said pin tends to urge a force against said guiding surface;
• wherein the abutment of the casing strives to be in contact with said seat of said holder for centering said casing and said pin relative to said longitudinal axis of said holder.