A C-Class, E-Class, GLC or GLE takes a dash cam with no drilling at all. Stick the camera to the windshield behind the rearview mirror using the adhesive bracket that came in the box. Tuck the cable into the headliner seam, then run it down the passenger-side A-pillar weatherstrip. Power comes from the 12V socket, or from a fuse-tap hardwire kit at the footwell fuse panel. Budget 30–60 minutes, one plastic trim tool, and zero permanent changes to the car.
Two reasons. Only one of them has anything to do with resale value.
Curtain airbags run through the A-pillars of the W205/W206 C-Class, W213/W214 E-Class, X253/X254 GLC and W167 GLE. When those fire, the pillar trim and the headliner edge have to be free to move. Drive a screw, clamp or zip tie into that path and a cosmetic job turns into a safety problem. No dash cam is worth that.
The second reason is simpler: the hole isn't needed. Behind the mirror sits a flat piece of glass, the headliner edge swallows a cable, and the fuse panel already has spare slots. Adhesive brackets from Viofo, BlackVue, Thinkware and Garmin use VHB-style tape that survives Phoenix parking lots far better than any suction cup. The tradeoff is that you get one clean shot at placement, so measure before you peel the liner.
Every model shares the same target: behind the mirror, inside the wiper-swept area, clear of the sensor housing that feeds Distronic, lane keeping and the rain/light sensor. Blocking that cluster is the most common mistake in this job, and it can throw ADAS faults. NHTSA's overview of driver assistance technologies explains why those cameras need an unobstructed field of view.
| Model | Best mount spot | Cable path |
|---|---|---|
| C-Class (W205 / W206) | Right of the mirror stalk, just below the sensor housing. On the W206 the large MBUX screen tightens things up — check clearance for the camera body, not just the bracket. | Headliner seam to the passenger A-pillar, down the weatherstrip edge, then into the glovebox side panel. |
| E-Class (W213 / W214) | Left or right of the mirror. On cars with Drive Pilot options, the wide sensor pod pushes the camera further sideways, so dry-fit first. | Same path. The passenger kick panel holds the most slack for coiled excess cable. |
| GLC (X253 / X254) | Directly behind the mirror. Taller glass gives you more room here than in the other three. | Headliner to A-pillar. A panoramic roof means a tighter headliner seam — go slow with the trim tool. |
| GLE (W167) | Behind the mirror, angled slightly down. With that high hood line, a level camera wastes frame on sky. | Longer run than the sedans. Buy the 4 m cable version, not the 3 m. |
Legality. Windshield mounting rules are state-level and specific. California permits video event recorders only in defined zones, one of which is a small square in the center uppermost portion of the windshield; the statute text sits in California Vehicle Code § 26708. Read your own state's version rather than trusting a forum post.
GPS lock. Some Mercedes windshields carry an infrared-reflective coating that can slow satellite acquisition. If your camera takes minutes to find GPS, move it closer to the uncoated area around the mirror base before you write the unit off as faulty.
An adhesive mount and a fuse tap are not grounds for voiding a warranty. A claim can still be denied for damage the accessory caused — a battery drained by a badly set parking mode, or a chafed harness. Keep the install reversible and documented.
No. Recalibration belongs to the factory camera behind the mirror, and it matters when the windshield gets replaced or that camera is disturbed. A bracket stuck to the glass beside it changes nothing, as long as you don't block the sensor's view.
That varies by model and model year, and testing takes a minute: plug the camera in, switch the car off, lock it, and watch whether the camera shuts down. Still running? Then you have constant power and a slow parasitic drain to think about.
Passenger side, every time. It keeps the wire clear of the driver's knee airbag zone and the pedal box, and the glovebox gives you somewhere tidy for the coil.
Yes. Route the rear cable along the same headliner seam to the C-pillar, then through the rubber grommet or trunk-lid boot the factory wiring already uses. On the GLE and GLC, mount the rear unit on the glass above the wiper sweep so it stays usable in rain.
Author: MyHotMercedes Editorial. Updated: 2026-09-04