- Joined
- Oct 2, 2002
- Messages
- 2,901
- Location
- Woodford Green
- Car
- W140 S-Class, Porsche Cayenne and Porsche Boxster
Hi
My W140 S280 unfortunately failed its MOT today, due to Brake Efficiency (service and parking) being below requirements, the garage said that they can't tell me what it may be until they have it looked over, which can't be done until next week.
When I press the brake pedal I hear a hissing sound from the footwell, any ideas what this may be? General googling points at Master Cylinder, Brake booster or just needing a brake fluid change and bleed / flush.
Thanks
Tan
My W140 S280 unfortunately failed its MOT today, due to Brake Efficiency (service and parking) being below requirements, the garage said that they can't tell me what it may be until they have it looked over, which can't be done until next week.
When I press the brake pedal I hear a hissing sound from the footwell, any ideas what this may be? General googling points at Master Cylinder, Brake booster or just needing a brake fluid change and bleed / flush.
Thanks
Tan
