A little work to access the ignition module of the CLA. The product website has a video guide which made it fairly straight forward. Only two plugs to tether with the included harness at the ignition for 2014 CLA 250 (a little tricky to remove, used a small flathead to press the clips down while pulling the plugs out) and ample space to set the unit in place. It did go into valet mode when I first installed it, had to take it out of that and resync. So far so good. Range to remote start is good enough for my needs. One remote is two way while the other is one way. Came with other cabling and hood switch which are not needed. Nothing to solder or splice into. Note I did have weblink accessory to update the unit before installation, probably not required as the unit does not need additional online processing during steup.