Answer
Mercedes benz cards that such as the w211 e200 cdi, e220 cdi use what are called "low ash" oils.
approved low ash oils include:
aral tronic 229.31 5w-30
bp visco 5000 mb 5w-30
castrol formula slx turbo diesel 0w-30
castrol txt softec mb 5w-30
fuchs titan gt 1 5w-30
liqui moly toptec 7000 la
low spash motorenöl 5w-30 (daimlerchrysler)
midland synqron 5w-30
mobil shc formula la 5w-30
mobil 1 esp formula 5w-30 (from 3/2005)
pento high performance 5w-30 la
shell helix diesel ultra ae 5w-30
shell helix ultra ae 5w-30
wintershall viva 1 topsynth alpha la 5w-30
40
aral supertronic 0w-40 low saps (acea c3)
castrol gtd magnatec 5w-40
fuchs titan gt 1 10w-40
liqui moly top tec 4100 5w-40
midland synqron 5w-40
motor gold mid saps 5w-40
motul sae 5w-40 vollsynthetisch
pento high performance 5w-40 la