Lexus RX300 Manual page 211

DRIVING TIPS
Brakes and safety chains
D Lexus recommends trailers with brakes that conform to any
applicable federal and state/provincial regulations.
D A safety chain must always be used between the towing
vehicle and the trailer. Leave sufficient slack in the chain for
turns. The chain should cross under the trailer tongue to
prevent the tongue from dropping to the ground in case it
becomes damaged or separated. For correct safety chain
procedures, follow the hitch or trailer manufacturer's
recommendations.
CAUTION
D If the total trailer weight exceeds 450 kg (1000 lb.), trailer
brakes are required.
D Never tap into your vehicle's hydraulic system as it will
lower its braking effectiveness.
D Never tow a trailer without using a safety chain securely
attached to both the trailer and the vehicle. If damage
occurs to the coupling unit or hitch ball, there is possible
danger of the trailer wandering over into another lane.
196
Tires
D Ensure that your vehicle's tires are properly inflated. Adjust the
tire pressure to the recommended cold tire pressure indicated
below:
Tire pressure, kPa (kgf/cm 2 or bar, psi)
Front 210 (2.1, 30)
Rear 210 (2.1, 30)
D The trailer tires should be inflated to the pressure recommended
by the trailer manufacturer in respect to the total trailer weight.
Trailer lights
D Trailer lights must comply with federal, state/provincial and local
regulations. See your local recreational vehicle dealer or rental
agency for the correct type of wiring and relays for your trailer.
Check for correct operation of the turn signals and stop lights
each time you hitch up. Direct splicing may damage your
vehicle's electrical system and cause a malfunction of your lights.
Break–in schedule
D Lexus recommends that you do not tow a trailer with a new
vehicle or a vehicle with any new power train component (engine,
transmission, differential, wheel bearing, etc.) for the first 800 km
(500 miles) of driving.