Since I'm getting ready to replace the leaky steering box on my 380sl
with 150k miles on it, I'm wondering if I should take the opportunity
to replace the steering coupler too, even though there's no indication
that it's worn. Looking at the steering box, I was also wondering
whether it's possible to remove the pitman arm without removing the
exhaust pipe that comes off the left manifold and travels under the
arm.

Any advice would be appreciated.