For my M102 engine the oil pressure spec is .3 bar at idle or higher! It will increase to 3 when the engine is over 2000 rpm and fully warmed up. It pegs at 3 when started when not warmed up yet. My gauge drops to about .5 bar on really hot days, but mostly stays above 1 bar. Then again I also think my pressure sender is probably getting old and tired, but no need to replace until it dies. As long as there is pressure there the engine is fine and of course you do not hear ticking from the engine area due to oil starvation. Best bet if you are so worried is to get the pressure checked at a shop. Never truly trust an electronic gauge as gospel as well. May be the sensor is just not as sensitive as it used to be!

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~Jamie
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2003 Pewter C230K SC C1, C4, C5, C7, heated seats, CD Changer, and 6 Speed. ContiExtremes on the C7's.

1986 190E 2.3 Black, Auto, Mods to come soon.....