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Alx · 01-15-2007, 10:56 PM

Spark plugs are no biggie, try to stick with Kleemann for stage 1 upgrade.... They change the pulleys and upgrade the ECU with no red flags if you bring it to MB for service...

I had it all done on my 2003 CL55...

Renntech would be my second choice....

01-15-2007, 10:56 PM	#2
Alx Connoisseur Moderator Emeritus Join Date: Sep 2005 Location: --Poconos, PA.-- 2005 Aston Martin DB9 Posts: 6,012 Thanks: 1,243 Thanked 662 Times in 316 Posts	Re: I need a help with my E55 Spark plugs are no biggie, try to stick with Kleemann for stage 1 upgrade.... They change the pulleys and upgrade the ECU with no red flags if you bring it to MB for service... I had it all done on my 2003 CL55... Renntech would be my second choice....