Quote:
Originally Posted by drmlee
the right side reservoir cap is hard to open. i had to put a towel over it and twist it as hard as i could and it finally opened. use more force or get someone who is stronger to open it. it will open, i just had to add more coolant this morning.
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Funny thing on my 2019 540i the only caps labeled are for oil and windshield washer fluids.