Oh another thing. I just returned from a week trip outside the country (travel for work). I returned and tried to start my 260E only to find that its very hard to start. I cranked for about 10 minutes before it will start. After driving for a while and I turned off the engine. I restarted teh car and it seems to start ok. Is this a problem withe the cold start valve? I wonder what the procedures are for diagnosis hard cold starting. As opposed to throwing replace parts and guessing at it?