Hello Ohlord, off this topic, do the timingchain in this 97 E420 ever need service and when?. Thanks

 

Clean oil proper intervals members have 250000 miles on chain in the 420 engine,if it ever comes apart for rebuild,which you hope to avoid by properly maintaining it,then you measure the chain and replace it to specs.
no worries.
ohlord

 

Hi Ohlord, I've got the codes
1. P0302
2. P0304
3. P0308
4. P0300
All these shows the multi cyl. miss firing as the scan showed but I have not enough time to remove the spark plug cover because I need a special Torx socket, i hope it just the condensation on the spark plug or wires not the coils but your input will be very apreciated. Thanks

 

Security torx bits at schucks or kraggens what have you they have a little dimple in the middle and a whole set is about 7 bucks.Something needs to dry them off.
ohlord
you don't want to keep driving it long with the misfires cuz every miss means a whole cylinder of unburned fuel out the pipe and into the cat where it burns hotter than hell in the summer and that can take out a cat faster than a jack rabbit takes his lady friend.
ohlord

 

That's what I'm going to do this weekend, car have been out since the CEL lit up, thanks

 

Hello Ohlord.
The car is fine now, what a pain, this is what I've done to make it work again and thanks for your help.
1. Remove spark plug cover, 3 torx nuts on each side.
2. Remove ignition coils, unhook wiring harness.
3. Replace spark plugs.
4. Clean spark plug connectors.
5. Let it air dry overnight
6. Reset CEL light with code scanner.
Car is smooth like before and I learn a lesson not to hose the engine ever again, I think if it ever gets dirty, I'll wipe it down. Thanks for this forum and Ohlord.

 

Don't take it as a mistake.Consider it a cheap lesson in diy diagnostics.Besides you did the plugs and saved yourself hundreds of dollars,so it was worth it.You learned something and got paid doing it
ohlord

 

For members with the m112 and m113 320 and 430 engines I still have the special spark plug boot removal tool the makes the plug job much easier and avoids damage to the plug wires.
$28 delivered stateside
also have the special dipstick for the 722.6 transmission fluid change which is a must do if you have over 60k miles.$40 delivered
ohlord