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DIY Brake Rotor & Pad Replacement — 2013 Mercedes-Benz GLK350 4MATIC




DIY Brake Rotor & Pad Replacement — 2013 Mercedes-Benz GLK350 4MATIC

Replacing brake pads and rotors on the GLK350 is a very manageable driveway job if you follow proper procedure and torque specifications. The key is cleanliness, correct reassembly, and proper bedding-in afterward.

Vehicle Overview

  • Model: 2013 Mercedes-Benz GLK350 4MATIC (X204)

  • Front brakes: Ventilated discs

  • Rear brakes: Solid/ventilated discs (depending on option)

  • Brake system: Single-piston floating caliper (OEM setup)

OEM Part Details

Front Brakes

  • Front pads: A005 420 49 20 (or equivalent)

  • Front rotors: 345 mm ventilated discs

    • OEM: A204 421 18 12 (varies by build option)

Rear Brakes

  • Rear pads: A005 420 28 20 (or equivalent)

  • Rear rotors: 320 mm (approx.)

    • OEM: A204 423 10 12 (varies by build option)

Required Tools

  • Jack + jack stands (or lift)

  • Lug wrench (17mm)

  • Torque wrench

  • C-clamp or caliper piston tool

  • Socket set (13mm / 18mm common caliper bolts)

  • Brake cleaner

  • Wire brush

  • High-temp brake grease

  • Bungee cord or hook (for caliper support)

Torque Specifications (IMPORTANT)

Wheels

  • Wheel bolts: 130 Nm (96 lb-ft)

Front Brakes

  • Caliper guide pins/bolts: 35 Nm (26 lb-ft)

  • Caliper carrier bracket bolts: 115 Nm (85 lb-ft)

  • Rotor retaining screw: 10 Nm (7 lb-ft)

Rear Brakes

  • Caliper guide pins/bolts: 35 Nm (26 lb-ft)

  • Caliper carrier bracket bolts: 115 Nm (85 lb-ft)

  • Rotor retaining screw: 10 Nm (7 lb-ft)

Step 1 — Lift the Vehicle Safely

  • Loosen wheel bolts slightly before lifting

  • Raise vehicle securely on jack stands

  • Remove wheels

Step 2 — Remove Brake Caliper

  • Remove caliper guide bolts (usually 13mm or Torx)

  • Carefully slide caliper off rotor

  • Do NOT let caliper hang by brake hose

  • Support it with a bungee or hook

Step 3 — Remove Caliper Carrier & Rotor

  • Remove carrier bracket bolts (typically 18mm)

  • Remove rotor retaining screw

  • Slide rotor off hub

  • If stuck, tap lightly with rubber mallet

Step 4 — Install New Rotor

  • Clean hub surface with wire brush

  • Apply light anti-seize (hub only, not rotor surface)

  • Install new rotor

  • Secure rotor retaining screw

Torque rotor screw: 10 Nm (7 lb-ft)

Step 5 — Install New Brake Pads

  • Compress caliper piston fully using tool or clamp

  • Apply brake grease to pad contact points (NOT friction surface)

  • Install pads into carrier

Step 6 — Reinstall Caliper & Carrier

  • Reinstall carrier bracket bolts

  • Torque to specification

  • Slide caliper over new pads

  • Tighten guide pins

Final Torque Values

  • Carrier bracket bolts: 115 Nm (85 lb-ft)

  • Guide pins: 35 Nm (26 lb-ft)

Step 7 — Reinstall Wheels

  • Install wheels by hand first

  • Lower vehicle slightly to seat wheels

  • Torque in star pattern

Wheel bolts: 130 Nm (96 lb-ft)

Step 8 — Brake Pedal Reset

  • Pump brake pedal until firm

  • This seats pistons against new pads

  • Check brake fluid level

Step 9 — Bedding-In Procedure

To properly bed new pads and rotors:

  1. 8–10 moderate stops from 60 → 20 km/h

  2. Do NOT come to a complete stop while brakes are hot

  3. Allow cooling between runs

  4. Avoid heavy braking for first 200 km

Final Notes

The GLK350 braking system is simple but effective when maintained properly. Fresh rotors and pads will restore:

  • Strong pedal feel

  • Shorter stopping distances

  • Reduced vibration and noise

  • Consistent braking under load

If you want next, I can:

  • Turn this into a full HTML blog post like your performance builds

  • Add a big brake upgrade comparison (OEM vs AMG vs aftermarket)

  • Or build a YouTube step-by-step script with camera angles + narration

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