Mercedes-Benz W202 automatic transmission oil change and oil level
How do I change the oil in a W202 automatic transmission properly?
A plain change of about 3.5 litres leaves about half of the old oil in the gearbox. That is why the oil change is worth doing as a flush; the flush needs at least 8 litres of oil. It is worth changing the filter at the same time.
How is the automatic transmission oil level checked?
The level is measured with the gearbox at operating temperature. The dipstick is a special tool, and in its place there is a sealed plug, so the job usually belongs to a workshop. Oil in the tube spoils the measurement. Too much oil is more harmful to the gearbox than slightly too little.
What does black automatic transmission oil tell you?
Black, foul-smelling oil usually indicates clutch plate wear and slipping. It can point to a need for an overhaul. If there are no metal flakes in the filter, the gearbox may still work after a flush.
Is the gearbox oil level fine if it slips on a cold start?
When cold, pulling away uphill can slip if there is too little oil. Check the level at operating temperature before any other action and add the missing amount gradually.