Thanks for chipping in BlackMercedes, I have been hoping you'd see this post. I read of the difficulties you had with your own 722.6 when I searched the forum before posting. My car was March 1999 build and it has a 722.624 tranny. Will it not already have the upgraded ETC? I note the TSB at MBWorld is dated 29 December 1999, so maybe not.

I'm also concerned that mine might be a hardware problem: it used to shift beautifully. I'd welcome your further input, BlackMercedes, I'm worried about getting a bill for a new transmission! Also, how much is the ETC upgrade?

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JJ Rodger
2013 G350 Bluetec
1999 SL 500
1993 E300 diesel T
1990 190