They’ve done a head gasket, viscous fan change and a failed nsf suspension turret for me, 3 separate visits. They are easy to deal with and seem very knowledgeable (I don’t know a great deal about MB’s). They can supply a hire car for £10 a day but on my last visit, which was an emergency breakdown when the suspension turret came away from the wing, they were all booked out, so he let me use the garage run-around for the day as I needed a car to get to work. I don’t have any experience of other indies but I am quite happy to stick with MercCare.