Brakes
Brake fluid flush
Brake fluid absorbs moisture and quietly degrades, which is why a flush is time-based maintenance. The work itself is simple; the consequence of getting it wrong is not. Tools, hazards, and per-vehicle notes below.
Effort
- Skill
- 2/5
- Physical
- Not rated
- Diagnostic
- Not rated
- Consequence
- 5/5
Each axis is rated 1 to 5 against the catalog's shared difficulty scale. An axis without a rating is unknown, not easy.
Tools this job calls for
Requirement levels come straight from the job catalog. Required tools block the job; the rest make it faster, cleaner, or safer.
- Brake bleeder (pressure or one-man)Required
- Fluid transfer pumpRequired
- Nitrile gloves (box)Required
- Combination / ratcheting wrench setRequired
- Low-profile floor jackRecommended
- Jack stands (pair, rated)Recommended
- OBD scan tool (OBDEleven / VCDS)Recommended
Vehicle-specific data
BuildBay grades every vehicle-specific row on a provenance ladder: unverified rows are leads, community-verified rows have owner corroboration, and factory-verified rows match factory documentation. An unsourced torque value never gets printed, and this page prints no values at all. It shows where data exists and at what level; the values themselves live in the product, attached to an exact vehicle.
- PorscheCommunity-verified — confirm for your VIN
Porsche states this every 2 years REGARDLESS of mileage. It is a calendar item, not a wear item — the fluid absorbs moisture from the air whether or not the car is driven, so a low-mileage garage car is due on exactly the same schedule.
- Porsche · TaycanCommunity-verified — confirm for your VIN
Still every 2 years regardless of mileage. Regenerative braking means the friction brakes do far less work, but it does nothing about moisture absorption, so the interval is unchanged.
Pads commonly last far longer than on a combustion car. The trade is that iron rotors can surface-rust from disuse - cosmetic, clears with use, and the car periodically drags the pads lightly on purpose to keep them clean.
- Mercedes-Benz · E-Class / SL / CLS · 2003 to 2012Community-verified — confirm for your VIN
This car may have SBC (Sensotronic Brake Control): a pump-charged accumulator holds brake fluid at high pressure independent of the pedal. Confirmed on the W211 E-Class (roughly 2003 until its ~2006 facelift reverted to conventional brakes), the R230 SL (which kept SBC longer), and the first-generation CLS.
Opening any brake line or caliper — or working near the calipers, which the system can self-actuate — without first running the scan-tool SBC deactivation/depressurization routine is a fluid-injection and uncontrolled-pressure hazard. Blind pedal-pumping is not a substitute.
The SBC hydraulic unit is itself a known wear item (warning lights, degraded pedal, brake-system message) with a large recall and extended-goodwill history — have a dealer run the VIN before paying for a unit out of pocket.
Sourcing status: Factory-sourced
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