Correct: you would think a 3.7 litre motor would make it a S370, but no longer does the number part of the model designation reflect engine size. It is definitely a 3.5l. The same thing is happening lower down the range: C180, C200 and C230 with the new CGI petrol engine all have 1.8 litre engines.

There will be a SL350: that badge hasn't been seen for a long time.

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JJ Rodger
2013 G350 Bluetec
1999 SL 500
1993 E300 diesel T
1990 190