H&R 05-11 Mercedes-Benz CLS550/CLS63 AMG W219 ETS (w/Air Susp./After 8/1/05) - 29241-2

All H&R ETS modules are plug-and-play, with no wire cutting and splicing or mechanical wrenching necessary. This means that no modifications to your factory wire harness are required and the module looks like a factory installation. H&R ETS modules come with all the parts required for installation. The ETS unit is easily removed whenever you want to return your car back to factory specification.