C55 Misbehaving!

[Aquanaut]

Hello folks, had my C55 for over a year and yesterday, for the first time, it started playing up. Cold start, in under a mile of driving it cut out 4 times. Started 'kangarooing' at one point and felt like i was driving with brakes on. each time it happened after i had to brake so at low revs. No warning lights. Steering felt heavier than normal as well. Today its been ok but defo feels different than normal. Also felt a 'pulling' from rear axle. Any thoughts?