Fella's,
My W210 has done 125K, and I'm considering changing the fluid of the .4 auto transmission. I believe the MB service schedule says that the fluid lasts for life, just like the diff in my previous W124 which went $$$ out at 100K...

What's your opinion? I understand it's not a cheap job like changing PS fluid, so if it's pointless I don't really mind skipping it.

Thanks!

__________________
2011 Prius

Only the 722.6 trans has "life-time" fill. The life time of that fluid is about 60K-75K miles!!

A 722.4 trans needs service every 30K miles.

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
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Retired Moderator

Be certain that the torque converter is drained of old transmission fluid as well.

BTW, "lifetime fill" is best considered as referring to the lifetime of the warranty.