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.
2000 Mercedes Benz SL600FACTORY OEM SERVICE PROCEDURE
SL500 (2000-2001)
CLIMATE CONTROL DIAGNOSTIC TROUBLE CODES
| DTC | Diagnostic |
|---|---|
| B1226 | In-Vehicle Temperature Sensor |
| B1227 | Outside Temperature Sensor |
| B1228 | Left Heater Core Temperature Sensor |
| B1230 | Evaporator Temperature Sensor |
| B1231 | Engine Coolant Temperature Sensor |
| B1232 | Refrigerant Pressure Sensor |
| B1233 | Refrigerant Temperature Sensor |
| B1241 | Refrigerant Fill |
| B1416 | Coolant Circulation Pump |
| B1417 | Automatic A/C Monovalve |
| B1419 | A/C Compressor Clutch |
| B1420 | Idle Speed Increase |
| B1421 | Auxiliary Fan (AIR) Control Module |
| B1422 | Serial Interface (K1) |
| B1423 | Switchover Valve Block |
| B1452 | Left Air Outlet Feedback Potentiometer |
| B1453 | Left Air Outlet Potentiometer |
| B1454 | Center Air Outlet Potentiometer |
| Right Air Outlet Potentiometer See RIGHT AIR OUTLET POTENTIOMETER under TESTING. |
|
| B1457 | Center Air Outlet Feedback Potentiometer |
| B1458 | Right Air Outlet Feedback Potentiometer |
| B1459 | Serial Interface (K2) |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.