Hi, I am new to both this forum and to driving the S Type jag which so far is great. I have had the car for around 3 months and it has just developed an intermittent fault. The car vibrates quite excessively for around 5 miles then seems to smooth its self out. The last time this happened, I pulled over, but the engine ticked over beautifully but once pulled away again the vibration was still there for around 5 more miles then ok. This happens around once a week. The steering wheel picks up the vibrations and feels like an unbalanced washing machine on full spin. The jag is a 2.7 Diesel 2007. Any help would be most appreciated.