i have a 190e-1993 but 1.8 litre uk spec car.

i can confirm that the spark plugs are bosch h7dco-or beru 14k-7duo or champion s9ycc.-this is for a uk car.-so i guess it would be best to go for bosch h9dco as per some of the other responses you have had so far from the u.s.

you will probably be able to get the bosch plugs from the fastlane link at the top of this website,and be able to see exactly what you are buying as they have the pictures as well.