1) Does the SRT-6 have a manual transmission? Out SLK32's only came with the 5-sp auto.

2) MB states that that 236.10 fluid must be used.
Through hours of research, I found that we can use the newer (7-speed) fluid (MB 236.12)

3) Shell 3353 is 236.12 certified. I bought a case at $9.26/qt. The container doesn't have any "generic" ATF statements. It says: Meets MB 236.12 spec for use in MB 7-speed transmissions. Also for use in older 5-speed auto trans. Backwards-compatible with 236.10 fluid.

**Edit: I'm talking the 5-speed auto (Tiptronic) tranny / ie. 722.6 **