my 500 went to dealers today for fault diagnosis for the slight missfire and power hesitation problem.. they told me no fault was found(no codes)were revealed.. however they said changing the fuel pumps / filter could solve the problem... are they talking sh**... the technician working on my car has been on the tools for 25 years...there was no mention of the wiring loom problems on these cars...any suggestions..

possibly air mass sensor.