I got the brake fluid flush service done at MB dealership last June. Since then I have driven 10K mostly highway miles, including a trip from San Francisco, CA to Irving, TX. Do I still need to flush/bleed the system using the pressure bleeder or can I just bleed the bleeder screw a little and drain some old brake fluid. Please advise.
And you are right lkchris, I haven't read the official Mercedes procedure. I just followed the DIYs on the forums (DIY-Brake.pdf by gregs210 and other brake-related DIY posts). But I did not follow the instructions properly thats why I landed in this problem.
Just to be clear, if I were a line mechanic I wouldn't do it either because you'd spend a fourth of your work day on this extra step.
However, as I've said repeatedly, even though I maintain my cars properly, I always do this. You only need to lose a master cylinder (or ABS system) once to decide you never will just shove the fluid back up the line, either.
The flip side of this coin is that if you crack the bleeder screws, compress the pistons, snug the screws and then flush when you're done, that often works out to about the recommended interval for flushing the brake fluid, so you kill two birds with one stone.
My bottom line when I post DIY-type stuff is to recommend it to the LCD. I don't ever want someone coming back saying "I followed that guy's recommendation and now I have to buy an ABS pump" etc.
So it's always the choice of the one doing the work, all I do is suggest and recommend, but neither will I apologize for a suggestion that is outside the ambit of the WIS.
Pash, for your C240 take a look at richardm98's flush information for the W210 (which he says is from the WIS or manual, can't recall which). IIRC you don't have to worry about the added steps in the bleeding procedure listed above, I think it's like the GM systems that it won't suck in air if the screw is cracked with the hose on it.
Take care and enjoy the ride,