I can contribute by adding something similar. My 2018XF vibrates at lowish revs at 22-24 mph (common in Kingston) and again at 31-33 mph. This is always on soft throttle, ie not accelerating or slowing. My main dealer has known of this for 18 months but until I insisted on a test drive with a technician have done nothing. He agreed, and proposed it was “harmonics” arising from the exhaust system being attached to the body rather than suspended; possibly dampers over tightened. Now, after 2 weeks, the dealer wants to return the car unchanged, and insists that the fault is my driving technique, causing the engine to stumble between gears. Oh, and I didn’t drive with a grade 4 technician, he was from QC.
This isn’t about the quality of my dealer, just intrigued to know if anyone else has experienced this.
David Sherry
