Does the Mercedes GLA use a radar or a camera for DISTRONIC?

Both. DISTRONIC uses a long-range radar behind the front badge for following distance. The windscreen camera handles lane keeping and additional collision inputs. After windscreen replacement, camera calibration is always required — radar calibration is needed if the bumper has been disturbed.

My second-gen GLA lane assist started drifting after windscreen replacement — is this calibration?

Yes. The stereo camera on the second-generation GLA is highly sensitive to alignment. A replacement windscreen that sits even slightly out of position will cause lane assist to steer incorrectly or fault. Camera recalibration re-establishes the stereo reference and resolves the issue.

Can you calibrate both the GLA 200 petrol and GLA 220d diesel?

Yes. All GLA variants — petrol, diesel, and 45 AMG — use the same ADAS sensor positions. Calibration procedures and pricing are identical across all engine variants.

What is Active Blind Spot Assist on the GLA and does it need separate calibration?

Active Blind Spot Assist uses radar sensors in the rear bumper to detect vehicles in adjacent lanes and steer the car away from a collision. These rear sensors require calibration if the rear bumper is removed or the car has a rear-end impact. It is a separate process from the front camera and radar calibration.

GLA ADAS Calibration

Mercedes GLA ADAS Calibration

The Mercedes GLA compact SUV - in both first (2013-2020) and second generation (2020+) - carries Mercedes DISTRONIC and Active Brake Assist using a combination of radar and a multifunction camera bonded to the windscreen. On the second-generation GLA, the camera and radar work together as a combined sensor system behind the windscreen, making this one of the more calibration-sensitive vehicles in the Mercedes range following any windscreen work.

We calibrate GLA sensors at our workshops across the UK - same-day availability, fixed pricing.

ADAS Systems on the Mercedes GLA

First generation (H247, 2013-2020): DISTRONIC PLUS and Active Brake Assist use a long-range radar behind the front badge, with a camera mounted at the top of the windscreen. These operate as separate sensors.

Second generation (H247, 2020+): The new GLA uses a stereo multifunction camera bonded at the windscreen alongside the front radar. Active Lane Keeping Assist, Active Blind Spot Assist, and DISTRONIC with route-based speed adjustment all depend on this camera. The stereo format means alignment precision is higher - a windscreen replacement that is 2mm out can produce lane assist faults even when Active Brake Assist appears to function normally.

When Does the Mercedes GLA Need ADAS Calibration?

After windscreen replacement - multifunction camera recalibration is mandatory after any glass change on both generations.
After front bumper work - front radar realignment required after bumper removal or collision repair.
After a front collision - both sensors require verification and recalibration.

Mercedes GLA Calibration Pricing

Service	Price
Windscreen Calibration	£199
Radar/Sensor Calibration	£349
Collision Calibration	£349
Full System Reset	£499

Mercedes GLA ADAS Calibration

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Mercedes GLA Calibration Cost

Windscreen Calibration

Radar/Sensor Calibration

Collision Calibration

Full System Reset

ADAS Systems on the Mercedes GLA

When Does the Mercedes GLA Need ADAS Calibration?

Mercedes GLA Calibration Pricing

Mercedes GLA ADAS Calibration — FAQ

Other Mercedes Models We Calibrate