Wodnek, since you have one of each....the PO of my 06 told me that the bolt design (maybe using two instead of one?) on the 06 was improved, making black death etc. less likely. Curious if you observe any differences.

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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles
06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife