Are you saying that the engine does not CRANK until the 2nd or 3rd try, or that it doesn't FIRE? There is a difference.
As far as the clicking noise, plan on removing the dash to fix the problem. I wrote a guide on this recently.
www.benzworld.org
As far as the clicking noise, plan on removing the dash to fix the problem. I wrote a guide on this recently.

2005 CLK 320 - Undergoing Major Service
With the weather getting a bit cooler here in Florida, I pulled this vehicle out of service and started working on things today. Here is the list of service items that I will be doing over the next few weeks: Driver's seat belt re-webbed - it is getting frayed where the belt comes out of the...