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E320 Bluetec S420
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Discussion Starter #1
I know that the M104 have those variable valve and, is it suppose to be get noisy(sounds like if you had one of those K&N intake's but only happnes at 3200 rpm and above) when gets to 3200 RPM, or is this perfectly normal, It has lots of low end power and high end power, i like the sound it produces at 4500 rpm its intoxicating
 
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