I have used the iCarSoft MB II for years and am very pleased with it. While it can't do everything Star can do, it's pretty comprehensive. Now there's version 3.0. I think it's a good investment for $150 or so. No subscription needed. Others will recommend Foxwell, which I'm sure is just as good.

That said, I still think Star would be a good investment, even if just working on one car. I've never regretted having both the iCarSoft and Star. I have no doubt Star will save me money in the long run...plus it's fun!

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 158k miles
06 E320 CDI "Rutherford", Black on Tan, 177k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 144k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 72k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife