Have a lightly used Genuine Mercedes Benz Trickle Battery Charger. Great for if you need to store a car over the winter, or a long period of time. PM with questions, shipping from US, can ship internationally though. Asking $90 shipped.
Same as the one here on Amazon:
http://www.amazon.com/Mercedes-Benz-OE-Trickle-Charger/dp/B00GB9XZN8