ABS hydraulic unit

[Barry100]

Hi everyone.. Major problems with my 2003 SLK230 braking system. After fully bleeding all the brakes the pedal is hard but when starting the car it goes spongy with a lot of pedal travel. I have diagnosed using a Launch CPR123X SBD2 scanner and recived the following codes.
C10110 / C1103-001 / C1103-002 / C1149-002 / C1140-128 / C1202
There are no warning lights on the dash, just no brakes!
I have fitted a new battery and a new speed sensor to the right rear wheel. Is the hydraulic unit in need of replacement or are these codes related to external problems.
Thanks for reading and hopefully replying but it is driving me mad!!

 

[Petrol Pete]

Hello and welcome

Symptoms sound like a brake servo fault , often something as simple as the servo non return valve sticking or a problem with one of the vacuum hoses/connections.

 

[Barry100]

Thanks for your reply, Can't hear or feel any leaks around the servo but I will have another look at the servo tomorrow.

 

[Petrol Pete]

You wont hear it , might need a visual and/or smoke test.