Mercedes CLS ADAS Calibration

ADAS Systems on the Mercedes CLS

The CLS (C257, 2018+) is built on the same platform as the E-Class W213, sharing identical ADAS architecture:

• DISTRONIC – adaptive cruise control via the long-range radar behind the front grille star badge. Standard across all CLS trims.
• Active Brake Assist – automatic emergency braking using front radar and multifunction camera.
• Active Steering Assist – semi-autonomous motorway driving. Standard on AMG Line, available on Sport trims.
• Active Lane Keeping Assist – camera-based lane detection with steering correction.
• PRE-SAFE – pre-collision occupant protection.
• Blind Spot Assist – rear-mounted radar sensors monitoring adjacent lanes.
• Traffic Sign Assist – speed limit recognition via the multifunction camera.

The CLS carries Active Steering Assist as standard on more trims than the E-Class saloon. A bumper repair that misaligns the radar doesn't just disable DISTRONIC – it takes Steering Assist offline too.

Common CLS ADAS Triggers

After Front-End Bodywork

The CLS's low-slung front end sits closer to the ground than the E-Class saloon, making it more susceptible to kerb damage and car park scrapes. When the bumper is removed for repair, the radar behind the star badge shifts – DISTRONIC and Active Brake Assist both go down. Radar calibration restores functionality.

Windscreen Replacement

The CLS's raked windscreen positions the multifunction camera at a steeper angle than the E-Class. After windscreen replacement, the camera needs recalibrating to restore Active Lane Keeping Assist, Traffic Sign Assist, and automatic high beams. The windscreen company replaces the glass – we handle the ADAS calibration they can't.

Cat S/N CLS Purchases

The CLS is desirable in the salvage market, and front-end collision damage often disturbs the radar without being checked during repair. If you've bought a Cat S or Cat N CLS and DISTRONIC won't engage, the radar needs recalibration. Our Cat S ADAS guide explains what to expect.

Mercedes CLS Calibration Pricing

Because the CLS shares its ADAS platform with the E-Class, the calibration procedure and pricing are identical. Our £349 Collision Calibration covers both radar and camera recalibration in a single appointment.