thanks, i looked for some pricing on exhaust valves and the 617 valve sure must have something special,its really high.
seeing as how there is a hazard involved in handling the sodium filled valve it makes sense to me that they would have some sort of code marked.
i have a exhaust valve from a 602(2.5 liter) in my hand and the number is (a6010527 and then the mercedes symbol). i gave the number to my parts guy and his computer dosent recognize it as a good number.
did you cut one to determine sodium present?
thanks larry perkins