Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Control Units
/C Blower Control Unit On right side of A/C evaporator housing. A/C Control Unit In center of dash. Air Bag Control Unit Under front of center console. A/T Control Unit Under left side of dash, on left side of pedal bracket. Automatic Seat Control Unit Under driver seat. Cruise Control Unit Behind glove box, on right side of dash. Fuel Injection Control Unit In electronic control box, under passenger-side footwell. Power Window Control Modules (2) In auxiliary relay station No. 2. Rear Differential Lock Control Unit Under center of rear seat. Servotronic Control Unit Behind glove box, on right side of dash. Shift Lock Control Module In auxiliary relay station No. 2. Taillight Control Unit On left side of trunk, near antenna.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.