I was given a service shop software once, for mb, you put in yoru car's info and as much as you can int he program about what was done when, and then it reminds you of services, and then you check off and put notes on what is completed. Cool program, Can't remember where it is though.
'92 300CE - Sold
2004 C240 - C7 Wheels
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.