Just recall that these "tuners" you speak of are dealing with low-tech American iron.

Your Mercedes has all the ignition it needs, as it's a quality car.

It probably even still has the sticker warning the stock system can kill you.

Save your money for transmission and HVAC repairs.

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Kent Christensen
Albuquerque
'07 GL320CDI, '10 CL550. '01 Porsche Boxster
Two BMW motorcycles