Love this forum and I know I have just scratched the surface. Car is my first MB, and I love it already. First question is for fellow 98-99 owners.. what is the best rpm to operate at efficiently?? I know in my cummins powered dodge pickup it is between 1800-2000 rpms. Just curious as to others opinions on this.

Second one is a general MB question in regards to motors and trannies, what are all the numbers I have been reading on the site and where can I decipher them best? (606 motor or tranny etc., i have the 210 chassis figured out, and generally understan 229.3 or .5 oil)

Thanks in advance for the help.

Matt