I've seen them too especially with the w210, w203 and some w204 model eras. The w204s I've seen have analogue gauge clusters as opposed to the digital ones more commonly seen and have black fabric seats.
Shahnawaz now sells what it calls as its "own" spec. It basically comes with the panoramic roof, parking sensors, beige interior, 4-way powered seats and entry level COMAND system. Anything above and beyond these features is a paid option.