Hi. I have a 2003 E240 and got the service brakes warning. Deactivated SBC, Depressurized, Changed the pads and bled using the MB Star Diagnostics and came up with a C2131 (Pressure Reservoir Faulty) code.
Changed the Pressure Reservoir as advised by the MB Star and also after reading some forum posts to confirm that this should be done but still we are not getting the fault cleared.
The old pressure reservoir had a "pretensioning pressure" of 64 bar... Specific values should be 72 to 102 bar.
The NEW Pressure Reservoir is only giving me 62 bar. We've bled using the Star and also a pressure bleeder but the fault and warning are still there. Does this need to be programmed or something?
Thanks in advance for any tips or recommendations.

 

If you have a standalone version of WIS on your DAS Xentry laptop refer to the install docks for help---however DAS would tell you if programming is\ was necessary and I doubt that it is on MY03,but


Additionally the pressure reservoir was new ---correct not some second hand crap!!

 

Thanks so much for the reply.
Star made no mention of programming so I guess we will try to bleed them again. I hope it works this time

 

Try performing STAR air release routine (do not disrupt while in progress) to clear reservoir internal check valve, if code persists try deactivating and reactivating SBC.

 

Your SBC may have outlived it's service life.