My 2000 sl500 had 2 codes p0170/p0173
did a search and found to be vac lead or mass air sensor
Not that this has anything to do with engine light But

My question is during the diagnostic end I checked fuel pressure
It was jumping at idle from 56 to 58 lb
when I increased speed it stabled out at 58lb
My question is this normal jumping pressure at idle and amount of pressure
55,000
Any help would be appreciated
Mike

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[B]Mike Y.
00 sl500 sport
88 560 sl (sold)