My advice would to to just be nice and to not BS your customers. A lot of MB owners are business people and we don't want to be BS'd with.

I have used MB of North Haven and they have always treated me well, the SA was friendly and helpfull.

One mistake some dealers make is they treat the people with older cars poorly. Which costs them business because just because I have a 20 year old car today, doesn't mean that next year I may want to buy a new E350.

For example the PO on my 300SD bought his new S430 from a dealer because they treated him well when he brought the old 300SD in. And this year he is thinking about buying an S550 from the same dealer. If a SA had pissed him off they would have lost two new S class sales.

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2006 CL500
1969 280SE
2023 Ram 1500
2026 Genesis GV70
2007 Tiara 3200