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w126 300SD 1981 - Vito W638 108 CDI 2000 - W209 CLK cabrio 2003
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152 Posts
Discussion Starter · #1 ·
Can someone help me out with a problem I have with my SL300 R129.

When the engine is warm and in idle position the oil level is below 1.
There is no oil loss. When I put the gaspedal down the oil level is 3.

Is it normal that the oil level is below 1 when idle and engine warm?

thanks.
 

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Greek God of the R129
SL500-500SEL-190E
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8,603 Posts
CK the oil thickness and temperature you are.
Most likely your oil is to thin.
Regards.
aam.
 

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E350 Sport
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i use 20/50 and will see a little over 2 idling.
 

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w126 300SD 1981 - Vito W638 108 CDI 2000 - W209 CLK cabrio 2003
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152 Posts
Discussion Starter · #4 ·
thanks for the replies.

i will put 20w50 in tomorrow.

:)
 

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5,343 Posts
I would assume you are talking about the oil pressure gauge, not the oil level. The conditions you describe are perfectly normal. See your owner's manual.
 

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I can't believe they would even sell 20/50 in The Netherlands, but whether they do or not it would be a really bad idea in that climate.
 

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w126 300SD 1981 - Vito W638 108 CDI 2000 - W209 CLK cabrio 2003
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152 Posts
Discussion Starter · #8 ·
They do sell 20w50 in The Netherlands. I have bought it a couple of days ago. Have not yet put it in though.
After reading the replies up till now, I have checked the manual, but it is a bit of a mystery to me. I called a MB-dealer here and they advised to put in 10W40 for this 300SL 1989. (when the engine looses oil more they advise 10w60).
So I think it is best to take the 20w50 back to the shop buy the 10w40 instead.
 

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Oil viscosity is not addressed in the owner's manual, but in an ancillary "approved fluids" brochure that came with your car. It has a high/low temperature range chart, which indeed is likely to say that 10/40 would be fine in your climate. But to your original question your oil pressure is fine now.
 
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