dealer part spark plugs for the 1991 300E

For my 91 300E 3.0 dealer ordered spark plugs Is a beru DUO of some type How can I confirm non resistor Does the R0 on the plug itself denote resistor Need to act fast, I have a chance to return these if they aren't right

For my 91 300E 3.0 dealer ordered spark plugs

Is a beru DUO of some type
How can I confirm non resistor
Does the R0 on the plug itself denote resistor

Need to act fast, I have a chance to return these if they aren't right

---------------------------------------------------------------------------
Visit this link to stop these emails: https://zpr.io/t5iAW