Advice on troubleshooting PS leak



I searched the forum but have not found much. My 2002 CLK55 is leaking power steering fluid. I have to add a little bit about every 2 weeks. I had it up on a lift a few weeks ago and I could see that the steering rack / gear was wet and shiny. I did read it could be as simple as the reservoir seal leaking.
Thanks for any info!





