Many parts on Bosch CIS fuel injection are compatible between makes of automobiles. Many of the parts are exactly the same. For instance: parts from Volkswagen to Audi (or vice versa) are very compatible. Bascially, if you own car with CIS you are not limited to the specific model and make. If you need a CIS part for your Mercedes, you can also look for parts on BMW, VW, Saab and so on. Just be careful, there is a difference between K and KE, not all the parts differentiate, but KE has some parts the K does not.