When you install aftermarket coilovers on select 09-16 Audi A4, 08-17 A5, 10-16 S4, 08-17 S5 models you are bound to get the dreaded dash error code lights. The Öhlins EDC Cancellation Kit #35020-19 for Road & Track coilovers deactivates dash lights and error codes when electronically adjustable OEM suspension is replaced by a mechanical system.