Speculation continues as more Mercedes GLK mules are spotted with LED lighting. Are these the upcoming GLK Hybrid models?

Hot on the heels of yesterday's sighting, we've got another Mercedes GLK test mule sporting LED lighting, this time on the side mirrors. The extensive use of LED lighting on these winter-testing prototypes suggests strongly that there's more distinction under the skin. It's looking more likely that we're seeing the upcoming GLK hybrid, which was previewed at last year's Geneva show, undergoing some final cold-weather testing before launch.

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