I have a 1994 SL500 with 165,000 miles.I noticed today the oil pressure dropping to 1 at idle on the gauge.I have never noticed this before.The temperature at driving speed is at 3.
Is this normal to drop to 1 at idle or do I have a sensor or oil pump problem?

Please help I'm worried!

IN warm weather at idle the normal pressure is at & or below 1 bar. At 2000 the pressure should peg the guage.

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Thank you for the reply.
You have made me sleep better tonight.