well if you are going to let the car sit till then, at least fill the fuel tank with premium gas and put some stabil or something similar to keep the fuel fresh. Pretty much inspect the whole car. Brakes, tires, suspension, fluids, electrical, tune-up, etc.. Check all hoses and belts. If you like, wash the car real good and treat the body with some rust inhibitor like P2S or something similar until then.

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2001 E55

2001 E320 Sedan

2001 Subaru Legacy

2006 SLK280

2016 Subaru Outback 3.6