Reviving an old thread in case anyone is interested....

Talked to the folks at Lucas....the Lucas Power Steering Stop Leak IS NOT compatible with the Pentosin CHF 11S that the newer cars use....but it IS compatible with the 236.3 standard used for W210 and earlier cars.

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 161k miles
06 E320 CDI "Rutherford", Black on Tan, 180k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 147k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 81k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife