Remove dust from the leather often, using a cloth or vacuum cleaner.
Otherwise, particles of dust and road grime chafe in pores and folds, and lead to increased wear and premature degradation of the leather surface.
To guard against discoloration, such as from clothing, provide leather care roughly every two months.
Clean light-colored leather more frequently because soiling on such surfaces is substantially more visible.
Use leather care products; otherwise, dirt and grease will gradually break down the protective layer of the leather surface.
Suitable care products are available from the service center.
BMW X3 Service & Repair Manual > Front axle: Ring
Ring AM
Replaced by: 83300493560
NOTE:
(Spring retainer) With insert ring 31 3 101 only for series E46/without insert ring
31 3 101 for series E31, E39 front basic version Discontinuation and replaced
by 31 3 350. (0 493 560)
Ring AM
Replaced by: 83302213038
NOTE:
(Spring retainer ring) ...