Mercedes-Benz CLS Big Brake Kit Upgrade / TTSPORT Classic 8705
The Mercedes-Benz CLS doesn't need much help in the straight line — its 3.5L naturally aspirated V6 makes 306 hp and 370 Nm, good for 0-60 mph in around 6.7 seconds. But strong acceleration puts more demand on the brakes, and this CLS owner decided the factory setup, while solid, had more headroom to give. The fix: TTSPORT's TT8705 six-piston big brake kit, paired with a 355x32mm high-carbon heat-treated rotor and stainless steel lines, all fitted behind the car's stock 18-inch wheels.
The TT8705 caliper's orange finish is easy to spot through the spokes, but the real story is what's happening at the friction surface — bigger pads, a bigger rotor, and a stiffer caliper body doing the actual work of slowing the car down.
Vehicle & Kit Specs
Here's the hardware breakdown for this install:
| Item | Specification |
|---|---|
| Vehicle | Mercedes-Benz CLS, 3.5L V6 (306 hp / 370 Nm), factory 18-inch wheels |
| Front caliper | TTSPORT TT8705 cast six-piston fixed caliper, staggered piston bore sizes |
| Front rotor | TT 355x32mm high-carbon heat-treated curved-vane rotor |
| Brake lines | TTSPORT stainless steel brake lines |
Why It Works
The TT8705 caliper body is cast as a single piece rather than bolted together in halves, which cuts down on the flex that can happen at high line pressure — flex that shows up at the pedal as a soft or inconsistent feel. Inside, the six pistons aren't all the same size; the staggered diameters are meant to spread clamping force more evenly across the pad, which helps both pedal linearity and how evenly the pad wears over time.
- One-piece cast caliper body resists twisting under hard braking
- 355x32mm rotor adds mass and heat capacity versus the factory disc
- Confirmed to clear the car's stock 18-inch wheels
The rotor's curved ventilation vanes are shaped to sweep brake dust off the friction surface while also pulling heat out of the disc faster than a plain flat vane would. That matters because rotor temperature, not caliper clamping force, is usually what limits repeated hard stops — once a rotor gets too hot, the pad material starts to fade and pedal effort climbs even though you're pushing just as hard. A rotor that sheds heat quicker simply has more braking left in reserve before that happens.
Installation Gallery
Frequently Asked Questions
What wheel size does the TT8705 kit fit on this Mercedes-Benz CLS?
What's included in the TT8705 big brake kit?
Why does a six-piston caliper with staggered piston bores help pedal feel?
How does the curved-vane rotor design help with heat?
Need fitment confirmation? Choose the closest TTSPORT series or send your vehicle, wheel size, and intended use before ordering.