p0300,p0301,p0303 misfire on c320

Hi guys

I haven't been posting so much due no issues with my car.

well i had one since i bought my c320 7months ago it was rough/wavering idles but car run fine apart this so i didn't pay so much attention on it.
Day after day i noticed that fuel economy is bad. 13mpg in town, 26mpg on motorway so i decided to sort problem out. car never get any codes until yesterday.

i was on motorway and gave some heavy acceleration. when reached 4k rpm car suddeny lost power and check engine light came on.absolutely no power and revs were so poor.
when i managed to stop car was shaking on 0-15mph and engine felt like is going to jump out.
finaly i plugged my scan tool and discovered codes

P0300 - random/multiple cylinder misfire detected
P0301 - cylinder 1 misfire detected
P0303 - cylinder 3 misfire detected

i erased codes and car runs fine.

before codes car was getting vibrations on idle and revs wavering up and down. 2 months ago it passed MOT without single issue and with perfect emissions test.

car has new airfilters,cleaned maf and throttle body and all o-rings,gaskets are new. All parts are Mercedes OEM

also my scantool support live data so i run this mode. below are value on idle

717 rpm

DTC_CNT 0
FUELSYS1 CL
FUELSYS2 CL
LOAD_PCT(%) 19.2
ECT(*C) 73
SHRTFT1(%) 0.8
LONGFT1(%) -5.5 NO CHANGES
SHRTFT2(%) 2.3
LONGFT2(%) -3.1 NO CHANGES
MAP(kPa) 33.0
RPM(rpm) 717
VSS(km/h) 0
SPARKADV(*) -17
IAT(*C) 24
MAF(g/s) 4.41
O2B1S2(V) 0.520
SHRTFTB1S2(%) N/A
02B2S1(V) 0.140
SHRTFTB2S1(%) 2.3
O2B2S2(V) 0.550
SHRTFTB2S2(%) 99.2 NO CHANGES
OBDSUP OBDII


where i marked no changes it means that these values are frozen without move


also here is video(sorry for poor quality)
[YOUTUBE]http://www.youtube.com/watch?v=gmqyIZtlNZo&feature=youtu.be[/YOUTUBE]

here some info for my car it's 2001 c320 with 93k miles

Please help!
Thank You
Matt