Brake fluid Mercedes-Benz C-Class W205 (2014–2021) — DOT4 LV specification
Brake fluid for Mercedes-Benz C-Class W205 (2014–2021) — required specification, boiling points, system volume, and approved brands.
Caractéristiques techniques
| Parameter | Value |
|---|---|
| Marque / Modèle | Mercedes-Benz C-Class W205 |
| Années de production | 2014–2021 |
| Spécification du liquide | DOT4 LV |
| Point d’ébullition sec | 265°C |
| Point d’ébullition humide | 170°C |
| Volume du système | 700 ml |
| Intervalle de remplacement | 30 000 km / ans |
Marques approuvées
Mercedes-Benz DOT4 LV, ATE SL DOT 4 LV, Pentosin Pentanol-S LV
Why Brake Fluid Must Be Changed Regularly
Brake fluid is hygroscopic — it absorbs moisture from the air over time. As moisture content increases, the boiling point drops significantly. When the fluid boils under heavy braking, vapour bubbles form and the pedal goes to the floor (vapour lock). Mercedes-Benz requires DOT4 LV with a dry boiling point of at least 265°C.
How to Check Brake Fluid Condition
- Test strips — dip a strip in the reservoir; colour indicates moisture content
- Electronic tester — measures boiling point directly (most accurate)
- Visual inspection — dark/brown fluid indicates it must be replaced (fresh fluid is amber/clear)
Questions fréquentes
What brake fluid does Mercedes-Benz C-Class W205 use?
DOT4 LV specification. Point d’ébullition sec: 265°C. Volume du système: 700 ml. Marques approuvées: Mercedes-Benz DOT4 LV, ATE SL DOT 4 LV, Pentosin Pentanol-S LV.
How often should I change brake fluid in Mercedes-Benz C-Class W205?
Every 30 000 km or every ans — whichever comes first. This is a safety-critical service.
Can I mix different DOT grades?
You can mix DOT 3 and DOT 4 in an emergency, but never mix DOT 5 (silicone-based) with DOT 3/4 (glycol-based). Always use the correct specification: DOT4 LV.
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