I have not seen many if not any owners of the Merc type in the forum so far in my experience. I know a Twizy is a “bit” of a departure of the “luxury line” of creature comforts (maybe a bit of an understatement) however I know that Renault has been very serious about its electric vehicles for about a decade... Given this, the maturity in this technology will have variance based on strategic investment by manufacturers - Nissan, Renault, BMW, Tesla and a couple of others like Hyundai lead the charge in investment, testing and brining these new evolutionary vehicles in the market. With MB not having been one of the early adopters of this technology where R&D investment is substantial and takes considerable time (tooling factories, automation of build, etc) there is going to be a gap in reliability from the incumbent petrol/diesel matured technologies to the electric vehicle in “ALL Brands”. Picking and choosing in my case coming from a BMW background, I tested with a Twizy - then upgraded to a Zoe - so far its solid as both support, experience, and reliability has shown to be predictable and cost effective. I have seen Tesla’s having squeaky issues on the Model X, panel alignments, defective windshields, etc... they are still maturing as a manufacturer. With Renault I saw both a mature manufacturer and a technology investor and them standing behind their new products with a 24x7x365 service (which I have used with the Twizy) - The downtime was 3 weeks, cost to Renault was greater than the car was worth. So to answer your question - just know you are not alone in seeing a major failure due to this technology transition. While the expectations that MB would do better than other brands due to their prestigious line of products is not as realistic as you can expect. These are still early days for MB in the Electric field, sure they got the funds to get ahead of everyone in a few years. I think when it comes to today - we are all in the same boat. My philosophy as an early adopter is keeping things simple first (Twizy), step it up to a “Designed for Electric” like the Zoe (Tesla models would have been just as viable) - adapted to electric can have its risks (weight vs range, etc). All you can do is push on the Customer Experience teams to be taken care of while they sort out their bugs and be patient... I have had to be with Renault as well, and it has given its rewards in reliability and a good experience. Hope this helps gain some perspective.