The OTC bubble flare tool had decent reviews on Amazon. I'm not expecting much from a $30 tool. Professional grade flare tools are in the $300-$500 range, although these usually can do standard, double, and bubble flares (which are all different, btw).
http://www.amazon.com/OTC-4504-Stinger-Bubble-Flaring/dp/B0015PMZMU/
FYI, all the info I could find on the Rigid tool shown above indicates that it does singe & double flares only, not bubble (ISO / DIN) flares. The MB SLS valve has bubble flares.
Also, I found that AGS makes 6mm "Poly Armour" line in fixed lengths, with the correct M6x1.0 fittings for the SLS vavle. Amazingly, these are available through a number of McParts stores including Car Quest, O' Reillys, Advance, and I actually was able to get the line from Auto Zone - they had it in stock! They also had the 6mm fittings. I used line PA-720 and fitting BLF-51C-5 (which is a pack of 5). Nobody had the flare tool locally so I'm waiting for that to arrive on Friday/Saturday. Link to AGS 6mm info:
http://www.agscompany.com/automotive/brake-fuel-transmission-lines/poly-armour/320
Oddly, the hardest part was locating the bubble flare union fitting. Almost no vendor had this in stock, Auto Zone had the AGS union
BLU-10 but with a mininum order qty of 100. I found it via Automotive Aftermarket Supply (on Amazon) but it may take 3-7 days to arrive:
http://www.amazon.com/AAS-Bubble-Flare-Brake-277000/dp/B006HI6FRG/
I found a Mercedes part number that might possibly maybe be a 6mm union, I ordered one, and will compare to the aftermarket stuff. If it is correct, I'll post the part number & photos.
