I've had the Westfalia towbar and Westfalia Portilo bike carrier on my W210 E300 since 2009. They are both outstanding! Actually thanks to a kid texting and driving plowing into my bike carrier, I now also have a modified Portilo frame that carries a single bike.
The removable towbar is completely invisible when detached and so solid it destroyed the front of the Camry that rear ended me but my car never got a scratch. I've also towed a fully loaded trailer including motorcycle cross country and everything was solid the whole way.
With sales and the exchange rate you can have one shipped for only slightly more than the average wobbly Kuat setup. https://instagram.com/p/1EleDknmbO/?taken-by=ltmq Modified salvaged carrier.
https://instagram.com/p/UNUgDAnmcp/?taken-by=ltmq Cross country move.

https://instagram.com/p/FkW-5/?taken-by=ltmq Freshly installed.