Had a couple of 530d E60’s and they were a really good car with nice power coupled with a decent engine noise for a diesel. Then I got the 535d and it was Car I kept the longest. Immense power and the surge of torque kept my entertained for a couple of years. If I had the choice it would be the 535d. I can’t really comment on any issues as they were fairly new cars when I had them so no problems. Driving around town and like a loon the 535d would give 26mpg. Add in more country drives and maybe mid to late 30’s. Always a thirstier beast than the 530d.