Hi guys,
I just visited the newly open CEC tuning center in Coral Gables, Florida and spoke to Frank about doing some tuning for my 06 slk 55. He said that the two choices they had was to ge the 6.1 engine swap for a mere $46,000

or do the B55 upgrade. He called the California center and we spoke to a guy named Andrea. He said that it was a no brainer to get the B55 upgrade and that the difference would be noticeable right away as the horsepower would be increased to 400 and that they would also reflash the computer to increase top speed. If anyone outhere has had this upgrade done I would love to hear from you and get any input possible!!!
Thanks!!!