well it came back after 300-400 miles. It's definitely a swirls flaps on intake or engine ECU per dealer. They told me they can do swirl motor and clean intake for couple thousand dollars and than try re program ECU but no guarantee.
So I was sad and mad, than stop by Jeep dealer as same motor was used on some Jeep. But instead fixing I got trade deal and traded for Jeep GC diesel with warranty.

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91' MB 350 SDL, with 961 engine and #14 valve head
09' ML320 Bluetec