Sudden oil consumption !!!

[CycleSi]

Got a 2004 SL55 AMG with 47k miles and had it exactly a year.

lt has never used a drop of oil in that time, but driving to work today a warning suddenly flashed up saying "Oil level low, visit workshop".

The handbook said it would be either low oil or a sensor malfunction. When l followed the instructions it said "oil level low, add 2.0 litres" which l've now done and everything is reading fine.

However, why should it suddenly need 2 litres of oil? Also, it could have said add 0.5 litre or 1 litre or 1.5 litres so why if it has started to use a bit of oil would it be 2.0 litres unless it was sudden consumption?

Then l had a horrible thought that it might be a sensor and not actually used any oil but because it hasn't got a dipstick l couldn't check and now l may have overfilled it?

Any thoughts?

[CycleSi]

It seems you're right and everything is ok. l reckon the oil level dropped gradually and the sensor then said I want two litres of oil to take it back to the maximum. No sudden oil consumption and no sensor fault !