WORK DESCRIPTION FOR FIELD MEASURE
Code: 23P5490210
Version: 2.0
Apply preservation agent to PTC Heater Electrical Connections
Model 243
Work procedure
The following points must be observed prior to carrying out the work.
- Ignition OFF
- No accident vehicle
- The charging cable must be disconnected on the vehicle side
- Hood open
- A visual check of the electric lines in the high-voltage on-board electrical system for loose contacts or damaged insulation must be carried out in the working area.
It is not necessary to disconnect the power to carry out the work.
- Remove lower engine compartment lining (AR61.20-P-1105EQA).
- Apply a generous amount of spray wax to the ground line (A, Figure 1) on the high-voltage PTC heater so it coats all sides and surfaces of the connector.
After applying the first layer of wax, let it air-dry for 10 minutes and then repeat the waxing process a second time.
Make sure that the stranded copper wires in the ground strap (B, Figure 2) are fully covered with wax.
- Apply a generous amount of spray wax to the retaining clamp (C, Figure 3) of the electric lines on the high-voltage PTC heater.
Position the spray probe of the wax can upstream of the groove (D, Figure 4) to ensure that the wax goes under the retaining clamp.
After applying the first layer of wax, let it air-dry for 10 minutes and then repeat the waxing process a second time.
- Install lower engine compartment lining (AR61.20-P-1105EQA).
Parts
| Quantity | Designation | Part no. |
| As required
(1*) | Wax | A 000 986 32 01 09 |
* One container of wax is sufficient for at least 10 vehicles.
PTC Heater Electrical Connection Preservation Agent
Model(s) EQB300W4,EQB350W4
Model Year 2022-2022
- CORROSION PROTECTION: Protects internal body panels, frame rails and structural enclosures
- NON-HARDENING MATERIAL: Remains soft and pliable – will not crack, chip or peel
- SPECIFICALLY DESIGNED: Use with 3M Cavity Wax Plus Applicator Wand Kit (sold separately)
- REDUCES BULKY EQUIPMENT NEEDS: Convenient aerosol spray can eliminates need for bulk spray equipment
- SELF-HEALING FORMULA: Reflows into cracks and crevices for long-term coverage
- KBS Cavity Coater is the Perfect Solution for hard to reach areas that are prone to rusting
- Cavity Coater provides a self healing film which renders over 4000+ hrs. salt spray protection (meaning Insane Rust Protection) ...over 4 times the protection of conventional cavity waxes
- Use Cavity Coater with a KBS Cavity Wand to give long lasting protection for those hard to reach enclosed cavities such as rocker panels, boxed frames, inside doors And fenders, deck lids, tailgates...and more
- Resists alkaline solutions, most chemical and acid vapors, road salt, steam, salt water. Wicks and penetrates where primers and topcoats cannot!
- Creeps into Welds and Seams. 4000+ Hrs. Salt Spray (Insane Rust Protection)!
- 4000+ Hrs Salt Spray (Insane Rust Protection)
- Creeps into Welds & Seams: Wicks & penetrates where primers and topcoats cannot
- Water Displacing, Self Healing and Easy Application
- Resists alkaline solutions, most chemical & acid vapors, road salt, steam, salt water.
- Ultra Long Lasting
- 3M Cavity Wax Plus, 18.7 oz. (3M-8852)
- Corrosion Inhibiting Formula
- Improved Spray Pattern and Flowbility
- Convenient aerosol applicator
- Includes 6 Cans 3M Cavity Wax Plus Interior Corrosion Prevention Coating 08852 18oz Aerosol
- Corrosion protection for internal body panels, frame rails and structural enclosures.
- Non-hardening material remains soft and pliable – will not crack, chip, or peel.
- Convenient aerosol spray can eliminates need for bulk spray equipment.
- Use with 3M Cavity Wax Plus Applicator Wand Kit (sold separately) to ensure 360° coverage in closed cavities
Last update on 2026-05-27 / Affiliate links / Images from Amazon Product Advertising API
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WORK DESCRIPTION FOR FIELD MEASURE 1/3 Field measure management GSP/TPR Code: 23P5490210 Version: 2.0 Apply preservation agent to PTC Heater Electrical Connections Model 243 Work procedure The following points must be observed prior to carrying out the work. • Ignition OFF • No accident vehicle • The charging cable must be disconnected on the vehicle side • Hood open • A visual check of the electric lines in the high-voltage on-board electrical system for loose contacts or damaged insulation must be carried out in the working area. It is not necessary to disconnect the power to carry out the work. 1. Remove lower engine compartment lining (AR61.20-P-1105EQA). 2. Apply a generous amount of spray wax to the ground line (A, Figure 1) on the high-voltage PTC heater so it coats all sides and surfaces of the connector. After applying the first layer of wax, let it air-dry for 10 minutes and then repeat the waxing process a second time. Make sure that the stranded copper wires in the ground strap (B, Figure 2) are fully covered with wax. Figure 1 Code: 23P5490210 Version: 2.0 2/3 Field measure management GSP/TPR Figure 2 3. Apply a generous amount of spray wax to the retaining clamp (C, Figure 3) of the electric lines on the high-voltage PTC heater. Position the spray probe of the wax can upstream of the groove (D, Figure 4) to ensure that the wax goes under the retaining clamp. After applying the first layer of wax, let it air-dry for 10 minutes and then repeat the waxing process a second time. Figure 3 Code: 23P5490210 Version: 2.0 3/3 Field measure management GSP/TPR Figure 4 4. Install lower engine compartment lining (AR61.20-P-1105EQA). Parts Quantity Designation Part no. As required (1*) Wax A 000 986 32 01 09 * One container of wax is sufficient for at least 10 vehicles. Operation text and flat rate Operation no. Operation text Flat rate Accounting no./ damage code 12-1820 Operations: Reapply preservation agent to high-voltage PTC heater in area of electrical connections 0.4 h 54 902 10 Mercedes-Benz
Global Service & Parts D
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