CEL - CODE P0308 - Cylinder 8 Misfire

[hadam]

I drives 1997 E-420, car has 130K miles on it.

I got CEL (Chekc Engine Light) and Code P0308 Cylinder 8 misfire. Car idle is very bad and car shacks.

I went and got the new MB spark plugs from Dealer.

Yester day I installed the new plugs, then I reset the code. I started the car and got again code P0308.

Today I will install new coil on Cylinder 8.

Can someone tell me which one is Cylinder 8?

Is it one close to Firewall on driver side (Next to master brake unit) or the one close to Firewall on passenger side?

[Kajtek1]

From what I recall, the cylinder counting start up front on driver side and goes in zigzag to the rear.
Meaning #8 would be passenger side close to firewall.
Confirm that with somebody, since my memory might be bad
Post your location and model number in profile for easier help.

[hadam]

Thank you all for your help.

The problem was IGNITION COIL.

I changed all 8 spark plug ($3 each from dealer, why MB use Copper tip). MB P/N A 003 159 67 03

I changed one plug connector [MB calls it “Cable Plug"]. ($13) MB P/N A 000 159 41 42

I changed one ignition coil. ($95) MB P/N A 000 158 72 03

No more CEL, rough idle is gone, Car runs better then before.


Local German Shops wanted $400. [Why in the world these local German shop want to charge you $95 per hour rate, this is horrible, the reason you go to local shop so you can save, but you really don’t save too much with them.

Stealer wanted $650.

DIY cost me $140 plus 4 hours of my time.

DIY your self is PRICELESS.

[hadam]

Following is the correct Cylinder location for Enginer 119 (1997 E-420)

Here is how this goes then.

Cylinder 4, 3, 2, 1 On passenger side starting from closes to Firewall.

Cylinder 8, 7, 6, 5 On driver side starting from closes to Firewall.