I am replacing both front calipers and brake lines. Is it advisable to use locktite or other product on the mounting bolts for the caliper?
I know to only use DOT 4, but not the sythetic. Where, other than fastlane of course, can I get the non-synthetic Dot 4 fluid?

the mercedes "super blue racing" fluid is pretty good, they stock non synthetic fluid at my local autoparts stores and even wall-mart

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82' 300SD

I only saw the synthetic. Is the use of locktite advisable?

locktite is good...

What synthetic are you talking about? That valvoline stuff? That works fine in these cars.

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1985 CA 300D Turbo , 213K mi

I would use the BLUE loctite and not the RED.

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My Truck.. 2007 DODGE, 5.9 Cummins, 6spd stick, 4X4. My car..1977 240D, OTHER WHEELS...1955 VW Oval window bug, European Delivery (Holland) with a 1700cc, 2 barrel, Porsche drum brakes. 1939 WILLYS Pick-up. 1967 Triumph 200cc Tiger Cub. 1976 Honda 550F 4cyl Motor Cycle.

I would think most auto parts places stock dot 4, I just picked up a gallon, $30

For sure, use blue locktit on those caliper bolts.

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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"

There is nothing wrong with using DOT4 synthetic. It's the silicone DOT5 you don't want. All brake fluid is synthetic anyway isn't it?

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Len
'59 220S Cabriolet-SOLD and living happily in Malta
'83 240D 351,500 miles original owner-SOLD
'88 560SL 41,000 miles - totaled and parted out
https://sites.google.com/site/mercedesstuff/home
'99 E300 turbo 227,500 miles
'03 SLK320 40,000 miles - gave to my daughter
'14 Smart electric coupe 28,500 miles
'14 Smart electric cabriolet 28,500 miles
'15 Smart electric coupe 28,000 miles

I've used PB Blaster on the upper brake line connection. I'm concerned about damaging the hard brake line. Any ideas about the removal of the upper brake line from the hard line?

That's ATE "Super Blue" which is chemically the same as their TYP200 in the amber color.

My copy of Haines says to use Dot -3. Does it matter?

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dannyf
1984 Mercedes 300 SD 214 K miles. Runs on WVO ~ 22 mpg over 8 K on WVO
1997 VW Passat TDI 156 K miles. Uses biodiesel and diesel. ~ 41 mpg
1996 Mercury Villager gasser. ~ 20 mpg

Loctite is recommened on caliper bolts. DOT 3 good, just do not mix silicone? or synthectic, not compatible.

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83 SD

84 CD

OK, Thanks!

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dannyf
1984 Mercedes 300 SD 214 K miles. Runs on WVO ~ 22 mpg over 8 K on WVO
1997 VW Passat TDI 156 K miles. Uses biodiesel and diesel. ~ 41 mpg
1996 Mercury Villager gasser. ~ 20 mpg