It's from late 1995. As far as I know, later recommendations (e.g. in the manual for my 99), when synthetic had become more common, still specify checking the level at operating temperature.

I don't think anyone doubts the tendency of synthetic oil to adhere and that the level will be higher after the engine has cooled....least of all Mercedes engineers.

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 160k miles
06 E320 CDI "Rutherford", Black on Tan, 180k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 145k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 79k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife