1999 Subaru Legacy Owner's Manual - Page 280
1999 Subaru Legacy Manual
Page 280 highlights
Starting and operating J Trailer hitches WARNING Never drill the frame or under-body of your vehicle to install a commercial trailer hitch. If you do, dangerous exhaust gas, water or mud may enter into the passenger compartment through the drilled hole. Exhaust gas contains carbon monoxide, a colorless and odorless gas which is dangerous, or even lethal, if inhaled. Also, drilling the frame or under-body of your vehicle could cause deterioration of strength of your vehicle and cause corrosion around the drilled hole. D Do not modify the vehicle exhaust system, brake system, or other system when installing a hitch or other trailer towing equipment. D Adequate size trailer brakes are required when the trailer and its cargo exceed 1,000 lbs (453 kg) total weight. Choose a proper hitch for your vehicle and trailer. SUBARU does not offer accessory trailer hitches. Consult with a professional hitch supplier to assist you in choosing an appropriate hitch for your vehicle. Be sure to follow all of the hitch manufacturer's instructions for installation and use. J Side mirrors After hitching a trailer to your vehicle, check that the standard side mirrors provide a good rearward field of view without significant blind spots. If significant blind spots occur with the vehicle's standard side mirrors, use towing mirrors that conform with Federal, state/province and/or other applicable regulations. CAUTION - CONTINUED - 7-49