Owned 2 SEC Mercs in my time. They are rubbish but charming. I have no idea how they have the reputation that they do. All this "from the days when Mercs where made from granite" nonsense. They rust, lack power, have wallowing suspension and poor reliability. I love them !
I had a concours 420 SEC which I adored but the wife thought it was horrible. Sold it for £12k about 6 years ago and saw it for sale for £16k recently. Another I should have kept !