Hi, I have a W220 S320 CDI 51 plate and have got the 7.5A fuse blowing that supplies the 12v to the MAF. Have just replaces the wires direct to the ecu the MAF has been changed and it still pops in about 20 seconds of starting the engine. You know when it has gone as the Coolant warning comes on the dash and it goes into limp mode. The fuse is in the box left hand side of engine at the rear looking at the engine it is the 6th fuse down and I have no fuse diagram or wiring diagram available. Can anyone tell me what else uses this fuse so I can check for a short and has anyone else had this problem or a simialr one. Thanks.