// Official meaning
Mercedes definition: operation time of component A7/3 (the SBC hydraulic brake unit) is exceeded. The pump has counted past its programmed service life of roughly 300,000 brake actuations.
// On the bench
This is the code behind the famous grey "Service Brake! Visit Workshop!" message on W211/S211 E-Class, R230 SL and C219 CLS. It is a service-life counter, not an active hydraulic failure — the pump is usually still working perfectly well when the message appears. That said, a unit past its actuation counter is a unit running on borrowed time, so it deserves a proper decision, not just a clear-and-hope.
How it shows up
- Grey "SERVICE BRAKE! VISIT WORKSHOP!" message on the dash
- Brakes still feel completely normal
- Code returns shortly after being cleared
- Often stored together with C2498
What fixing it involves
Three honest routes, all through our dedicated SBC workshop at sbc-repair.com: a counter reset (£120 — nothing replaced, only right if the pump tests healthy), a full rebuild of your own unit (£430, 6-month warranty), or an exchange pump (£700, 12-month warranty, no core return). Complete on-car service — repair, reprogram, bleed and initialise — from £650.
Frequently asked questions
Is it safe to drive with C249F stored?
The grey message means the system is running in backup mode — short-distance driving is possible, but get the repair arranged promptly. If the message turns red, stop driving and call us: that is a different situation entirely.
Can C249F just be reset?
Yes — a counter reset is £120. But it replaces nothing: it only makes sense if the pump tests healthy. If the unit is tired, a rebuild (£430) or exchange pump (£700) is the honest answer, and we will tell you which yours needs.
What is the difference between C249F and C2498?
C249F is the lifetime counter — a service threshold. C2498 means the high-pressure reserve is depleted, which is an active hydraulic problem. They often appear together, but they are not the same fault.