I always knew they were there. We were told by the previous owner, which was a Lexus mechanic.

 

not all of them have heated mirrors (at least the sc3's). I know cause i had to get mine replaced and there are two different part numbers for two types of mirrors. Well thats what the mechanic told me after he ordered the non heated ones first.

 

Informantion on the heated mirrors are in the Factory Lexus Repair Manuals. Not the owners manual.

Included on cars without the "Winter Package"...Heated seats..etc..