A proper SBC rebuild replaces the parts that wear and proves the unit on a test bench before the counter is reset. Here is exactly what happens to your pump, what a reset-only job leaves out, and what we won't do.
Rebuild vs Reset
| Step | Full rebuild (£430) | Counter reset only (£120) |
|---|---|---|
| Complete strip-down of the unit | ✔ | ✘ |
| Motor and brushes inspected, replaced where worn | ✔ | ✘ |
| Worn seals, valves and O-rings replaced | ✔ | ✘ |
| Pressure accumulator replaced where required | ✔ | ✘ |
| Internal passages cleaned | ✔ | ✘ |
| Bench pressure test (pass mark: at least 160 bar peak) | ✔ | ✘ |
| CAN communication test | ✔ | ✘ |
| Lifetime counter reset | ✔ after the hardware passes | ✔ that is all it does |
| Laser-engraved serial, registered for warranty | ✔ | ✘ |
| Warranty | 6 months | None |
The SBC counter (around 300,000 brake actuations) exists because the unit wears. A reset switches the warning off and leaves every worn part exactly as it was. That's why we only do a reset after inspecting the unit, and only when you ask for it.
Step by Step
Straight Talk
Before You Pay Anyone
In the USA, Mercedes-Benz extended the SBC hydraulic unit warranty to 25 years with no mileage limit for 2003–2006 E-Class, 2006 CLS and 2003–2012 SL models, plus SLR and Maybach (Mercedes-Benz USA, 14 Sept 2018). We know of no equivalent published scheme in the UK, but it costs nothing to ask a dealer to check your VIN and put the answer in writing.
FAQ
No. A rebuild is a full strip-down: worn motor brushes, seals, valves and O-rings are replaced, the accumulator where required, passages are cleaned, and the unit is pressure- and CAN-tested on our bench. The counter is reset only after the hardware has passed. A reset on its own is a separate £120 service, done only after inspection and on request, with no warranty.
Every rebuild is laser-engraved with a unique serial number and registered for warranty, so the unit you get back can be traced to our bench and our warranty. Ask us any time what was replaced on your unit.
Our pass mark on the bench is at least 160 bar peak pressure, alongside a CAN communication test. The system runs at around 140 bar on the car.
24–48 hours from when your unit arrives, then it goes back by tracked courier. UK postage both ways is included in the £430 price.
Possibly, depending on where the car was sold. In the USA, Mercedes-Benz extended the warranty on the SBC hydraulic unit of 2003–2006 E-Class (W211), 2006 CLS (C219) and 2003–2012 SL (R230) models, plus SLR and Maybach, to 25 years with no mileage limit (Mercedes-Benz USA parts update, 14 September 2018). We know of no equivalent published scheme in the UK. Before paying anyone, including us, ask a Mercedes-Benz dealer to check your VIN and tell you in writing whether any warranty, campaign or goodwill applies to the SBC unit.