Anyone know where I can get metric hydraulic flare fittings. In particular, I am looking for an M12 x 1 fitting for a 6mm hydraulic line to the SLS control valve on my 84 300D wagon.

I have been ready to rebuild the control valve for a while, but I have been stopped in my tracks by a fitting that absolutely refuses to come loose. After using flare wrenches, torch, freon-freeze, PB blaster, and finally taking a vise grips to it, I mangled the fitting and it still will not come loose. I am going to have to cut the line and I will need to replace the fitting and re-flare the end.

Anyone have an old NG SLS valve...I will also need to replace the piece into which the high pressure (not return) line attaches to. It consists of a male end that threads into the SLS valve body, and a female end into which the 6mm metal line with the standard M12 x 1 bubble flare fitting threads into. In the MBZ manual, this piece is No. 31 in the diagram, and it is part no. 123 327 03 65.

I will also need to locate a bubble flare tool. Anyone ever use one? Is it easy?


The other option is to leave this stuck fitting in place and cut the line further up and just put in two standard Y-flare fittings and a connection block and use a standard single or double 45 deg. Y flare tool to flare the ends. But the local parts stores carry american 1/4 inch fittings and not 6mm metric fittings. I'm not sure if i can use 1/4 inch fittings on a 6 mm line which is slightly smaller than 1/4 inch.

This is a royal pain because once I cut the line I have to have everything I will need to fix it on hand since I cannot drive the car with the line cut.

I have never done this type of hydraulic line work, but I would rather invest in proper tools rather than pay a shop $100 or more to do this simple repair.

Any help or recommendations?

thanks,

Mark

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1984 300TD Wagon, 407,800 mi (current daily driver)
1985 300DT Sedan, 330,000 mi (gone to that great autobahn in the sky)