Mercedes-Benz GLA Brake Discs: Specs, Fitment & Wear Symptoms
On the GLA, genuine, original Mercedes discs are designed for aggressive autobahn speeds, meaning UK speed limits genuinely shouldn't cause true warping.
Illustration for editorial purposes
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OEM Part Number: A246421251207
| Front disc, pads, and wear sensor kit (shared with A-Class 176, B-Class 242/246, CLA 117) | Mercedes-Benz OEM: A246421251207 (disc), A0004209104 (pads), A1695401617 (wear sensor) |
|---|---|
| GLA180/200, front discs | 295mm diameter, vented, 28mm thickness, 26mm minimum |
| GLA220 AMG Line 4-Matic, front discs | 320mm diameter, vented, 30mm thickness, 28mm minimum — a genuinely larger specification than standard trims |
Mercedes-Benz GLA Brake Discs: The Part That Pads Depend On
On the Mercedes-Benz GLA, discs and pads work as a pair, and neglecting one tends to accelerate wear on the other — which is exactly why worn discs so often get discovered during what was meant to be a routine pad change.
Mercedes-Benz GLA Brake Discs: What They Do
Brake discs provide the surface the brake pads clamp against to slow the car, converting momentum into heat through friction. Larger, sportier trims of the GLA typically use bigger discs than standard versions to handle the additional heat generated by more aggressive braking.
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A Genuinely Distinctive, Honest Finding Worth Knowing — Mercedes-Benz GLA Brake Discs
If a vibration under braking has been diagnosed as warped discs, this is genuinely worth knowing: genuine, original Mercedes discs are designed specifically to withstand aggressive autobahn speeds, meaning UK speed limits genuinely shouldn't be enough to cause true warping under normal driving conditions. What's commonly mistaken for warping is far more often corrosion buildup or uneven pad material transfer.
It's also genuinely worth knowing a useful, cost-free fix: braking firmly from around 60mph five or six times can deglaze the disc and pad contact faces, often curing a vibration without needing to replace any parts.
Mercedes-Benz GLA Brake Discs: Wear Symptoms, DIY Difficulty & Aftermarket Advice
These are the same regardless of make or model — see our full Brake Discs Guide for warning signs to watch for, confirming fitment against your VIN, and choosing a reliable aftermarket disc.
More Mercedes-Benz Brake Discs
The same part, covered across other Mercedes-Benz models.