Electric Passenger Compartment Heater

WARNING: Incorrect handling of high-voltage components

Electric shock
Short circuit
Fire
Explosion
→ Only appropriately trained and authorized persons are permitted to work on high-voltage vehicles and components.

→ Required qualification: High voltage technician or high voltage expert.

→ Observe national requirements and legislation for this work.

→ Always use insulated tools, e.g. > VAS 6883 - Insulated Tool Set when working on these components.

→ Observe general warning notes for working on the high-voltage system.

> 2X00IN GENERAL WARNING NOTES FOR WORKING ON THE HIGH-VOLTAGE SYSTEM

WARNING: Hot fluid

Danger of scalding
→ Avoid contact with hot fluid.

→ Wear personal protective gear.

CAUTION: Hot components

Risk of burns
→ Let hot components cool down.

→ Wear personal protective gear.

Information

Protect high-voltage plug connections from dampness.
Do not release high-voltage plug connections until you have opened the cooling system.

Information

Handling high-voltage lines:

Do not support yourself or your tools on high-voltage lines and their components.
Work involving metal-removing, deforming and sharp-edged tools close to high-voltage components and lines is prohibited.
Work involving heat sources such as welding, soldering, hot air and thermal bonding close to high-voltage components and lines is prohibited.
High-voltage lines must not be extensively bent or kinked.
A visual inspection of the high-voltage connectors must be performed before installing the high-voltage lines. If there are signs of damage to the connectors, contacts and seals, the high-voltage line must be replaced.
In the event of queries or uncertainties, consult the relevant high voltage technician.

Information

Before fitting or removing the coolant lines, place absorbent material (paper, cloths) underneath to absorb any emerging coolant. Coolant must never get onto electric contacts.

Observe warning notes.
> 2X00IN GENERAL WARNING NOTES FOR WORKING ON THE HIGH-VOLTAGE ELECTRICAL SYSTEM
Disconnect coolant hoses -2- from electric passenger compartment heater -1- .

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Coolant hoses on electric passenger compartment heater
1. 2.1 Place a suitable container underneath to collect emerging coolant.
2. 2.2 Loosen spring band clamps -3- using > VAS 6890 - spring band clamps pliers .
3. 2.3 Disconnect coolant hoses -2- and close them off using suitable stoppers.
4. 2.4 Close off connection openings on the electric passenger compartment heater -1- using suitable stoppers.
Release and disconnect electric plug connections, pull holder -1- off the body -Arrow- and leave it hanging.

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Connector holder on body
Unscrew nut -3- from equipotential bonding line -2- at the electric passenger compartment heater -1- and remove equipotential bonding line.

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Ground cable on electric passenger compartment heater
Release and disconnect electric plug connection -2- on electric passenger compartment heater -1- .

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Electric plug connection on electric passenger compartment heater
Release and disconnect high-voltage plug connection -2- on electric passenger compartment heater -1- .

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High-voltage plug connection on electric passenger compartment heater
Loosen reservoir -1- .

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Reservoir on body
1. 7.1 Unscrew nuts -3- .
2. 7.2 Turn the reservoir -1- aside -arrow- so that the nut -4- on the electric passenger compartment heater -2- is accessible.
Remove electric passenger compartment heater -1- .

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Electric passenger compartment heater on body
1. 8.1 Unscrew nuts -3- on holder.
2. 8.2 Remove electric passenger compartment heater -1- .