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.
CLIMATRONIC Control Module -J255- Stuck In Center Console, Removing
At start of production, clips -A- are installed on the Climatronic control module -J255- that hold control head firmly in center console so that it cannot be removed without first loosening the retainer (a revised retainer will be introduced as a running change, the deadline is not yet finalized).
-- Remove radio or radio navigation system. Refer to Removal and Installation .
-- Remove trim -D-. Refer to Removal and Installation .
-- Using a small screwdriver -B-, reach in instrument panel opening and loosen clips retainer -A- (left and right on A/C / heater control head) from center console brackets -C-.
-- Slide Climatronic control module -E- out of center console.
Climatronic control module connectors, removing
-- Loosen retainers on connector -E- and remove.
-- Carefully turn Climatronic control module -F- 180°.
-- Release connectors -D-, -A- through -C- by pressing retaining tabs -G- and remove them.
Installing
Installation is carried out in the reverse order while observing the following.
- When replacing a Climatronic control module, observe exact allocation. Different versions, with or without seat heating switch, with different temperature unit (°C or °F) on temperature setting rotary switch, rotary switches with black or silver (chrome-plated) surface.
- Heater control head, replacement part number 8J0 819 043 starting with index "D", may be installed on 5 cylinder vehicles. VAS5051B in the "Guided Fault Finding" function.
- 5 cylinder vehicle may only have A/C controls, part number 8J0 820, 043 starting with index "D" testing and information system VAS5051B in the "Guided Fault Finding" function.
- After replacing/installing Climatronic control module -J255-, always perform the following work usingVehicle diagnosis, testing and information system VAS5051B in the "Guided Fault Finding" function
-- Recode Climatronic control module (or check code).
-- Perform Climatronic control module basic setting.
-- Check Climatronic control module DTC memory (and correct cause of any possible malfunctions displayed).
-- If necessary, check Climatronic control module adaptation.
-- Perform Climatronic control module output diagnostic test mode.
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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.