merc 190e-1.8 litre-1993 model - spark plugs

[sunil sood]

can anyone tel me the difference between a H7DCO AND H7DC BOSCH spark plug?

also are both of these compatible with a 190e-18litre -k reg car?
any useful advice or links appreciated.

 

[Andy]

merc 190e-1.8 litre-1993 model

Hi

Both are compatible for your vehicle. The H7DCO, have some sort of suppressor to stop interferance on the radio.

Regards

Andy @ www.mercedeservicing.com

 

[sunil sood]

merc 190e-1.8 litre-1993 model

andy, thanks for the reply but i thought an R IN THE SPARK PLUG CODE STOOD FOR A RESISTOR THAT SUPPRESSES INTERFERENCE ON THE YHE RADIO.-so what does the EXTRA o stand for?

 

[white190]

merc 190e-1.8 litre-1993 model

My guess would be that Andy is Right
The O is to denote the plug with an RF supressor....
usually only nessesary if you have interference problems