You can use a pipe wrench to turn the bolt. Jack up both rear wheels, adjust pipe wrench to fit snug, release parking brake and shift the car to neutral, rotate drive shaft with wrench attached all the way to the opposite side you will be turning to loosen, put car back in park, engage the parking brake and then go turn the wrench. Repeat that process until the nut is loose. It sounds like a lot, but it only took me a total of 20 mins, from jacking car up and putting it back on the ground. I only had to remove my exhaust heat shield and loosen the nut a bit (I replaced my center bearing/support and tightened it back up but them realized a few days later that the drive shaft should be able to telescope, I had the nut too tight.)

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1990 190E 3.0L