44 Copyright © 2009 Nokia. All rights reserved.Safety informationObserve the following safetyguidelines when you connect thecar kit to a car radio system:• Only a qualified servicetechnician should install orservice the car kit using theapproved original Nokia partssupplied in the sales package.Faulty installation or servicemay be dangerous and mayinvalidate any warranty whichmay apply to the car kit.• Do not wire the car kitequipment to the high-voltagelines of the ignition system.• Do not smoke when working onthe car. Ensure that there is nosource of fire or flame nearby.• Take care not to cause damageto electrical cables, fuel orbrake lines, or safetyequipment during installationwork.• Ensure that cables are placedso that they will not be subjectto mechanical wear and tear(for example, not laid under carseats or over sharp edges).Integration with a car radio systemTo connect the hands-free unitHF-22 of the car kit to a car radiosystem with the ISO cable CA-135or CA-152, see figure 1 or 2 at thestart of this guide.Nokia_CK100_APAC_UG_en.fm Page 4 Tuesday, December 8, 2009 2: