Buy 2018 Audi A6 2.0L A/T FWD Coil Spring. W/2 blue, 1 white & 1 yellow mark, w/2 blue, 1 white & 1 SUSPENSION, Blue, Yellow - OEM Audi Part # 8K0411105CQ (8K0-411-105-CQ)

Coil Spring.
Coil Spring.

Coil Spring

Fits A6, RS5, S6

W/2 blue, 1 white & 1 yellow mark, w/2 blue, 1 white & 1 yellow mark. W/O AIR SUSPENSION, w/1 yellow, 1 white & 2 blue marks, w/1 yellow, 1 white & 2 blue marks.
Suspension Coil Spring - Repair or Replace
Your coil springs are not especially prone to failure, but if they have been cut, clamped, or heated to have the vehicle lowered, your 2018 Audi A6 might benefit from replacing the strut springs. Excessive rust can make the springs more prone to failure. Contact your local Audi service department to have your suspension system evaluated.