i left my E420 outside for the whole day yesterday (was 10-15 degrees out), and when i started driving, the car really struggled to shift gears. after the car finally warmed up a bit, the shifting got real smooth again. car's got OEM MB ATF .. i really do not want to leave the car outside anymore since im sure this si not good for the tranny.. ?

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Current cars:
2001 MB E55 AMG
2003 Honda S2000
2000 Honda CRV

Gone but not forgotten:
2004 BMW 325i 5sp sport
1999 BMW 540i sport
1997 MB E420
1995 BMW M3 coupe