MSH300 - Heating DOMETIC - Free user manual and instructions

Product Type	Vehicle Seat Heater
Brand	Dometic
Model	MSH300
Product Number	9600000395
Dimensions of Heating Elements	Seat: 580 x 270 mm; Backrest: 580 x 270 mm
Power Supply	12 V DC
Power Consumption	3 levels: from 10 to 70 W per seat
Max Current	10 A
Number of Heat Levels	3 (high, medium, low)
Main Functions	Driver and passenger front seat heating, retrofitting, switch control
Delivery Contents	2 heating elements (seat and backrest), switch, control box, cable set, drilling template, double-sided adhesive tape, insulating materials, manual
Compatibility	Passenger cars, vans, motorhomes (front seats)
Maintenance and Cleaning	Avoid spilling liquids; do not switch on if wet; do not place sharp or heavy objects
Safety	Follow the vehicle's electrical instructions; disconnect the battery before installation; do not modify the product
Spare Parts and Repairability	Contact the manufacturer or authorized dealer; legal warranty upon presentation of the invoice
General Information	User and installation manual included; made in China; Dometic France customer service

Frequently Asked Questions - MSH300 DOMETIC

How to install the MSH300 seat heater?

Disconnect the battery, remove the seat, remove the cover, place the heating elements between the cover and the padding, secure them with double-sided adhesive tape, then connect electrically according to the provided diagram. Refer to the manual for more details.

Which vehicles are compatible with the MSH300?

The MSH300 is designed for front seats of passenger cars, vans, and motorhomes. Check compatibility with side airbags or detection systems before installation.

How to use the different heat levels?

Press the switch: once for level 3 (high), twice for level 2 (medium), three times for level 1 (low). Red LEDs indicate the level. To turn off, press until the LEDs go out.

Can I cut the heating elements to fit my seat?

Yes, you can cut the heating elements between the two black seams to fit the seat shape. Insulate the cut edges with the provided insulation. Do not cut lengthwise.

What to do if an LED does not light up?

Check the electrical connections and the fuse. If the problem persists, contact Dometic after-sales service. Do not attempt to repair yourself.

Can the seat heater be used with seat covers?

It is not recommended to place blankets or coats on the seat heater while in operation, as this could prevent heat dissipation and damage the system.

How to clean the seat after installation?

Avoid spilling liquids on the seat. If necessary, clean the cover with a damp cloth and mild detergent. Never use the heater if the seat is wet.

Is the MSH300 compatible with side airbags?

Yes, but you must follow the vehicle manufacturer's instructions. The backrest cover has breakaway points for the airbag; handle it with care during installation.

What is the maximum power consumption?

The maximum current is 10 A at 12 V, i.e. a maximum power of 120 W for both seats (70 W per seat at the highest level).

Where can I find spare parts or repair service?

Contact Dometic France customer service at [phone] or by email at [e-mail]. For warranty, attach a copy of the invoice.

USER MANUAL MSH300 DOMETIC

Line drawings of electronic components including a grid-patterned device, a small rectangular device, and cable connectors (no text or symbols)

MSH300, MSH301

EN Retrofit insert seat heater

Installation and Operating Manual.....9

Technical diagram showing exploded view of various electrical components with numbered parts labeled 1 to 15.

Technical diagram showing a mechanical assembly with intersecting lines and arrows indicating motion (no text or symbols)

Diagram of a mechanical or electrical component with directional arrows and cross marks, no readable text or symbols present.

Technical diagram showing labeled components of a battery pack, including a grid-patterned panel, connected cables, and a small electronic device.

5 THO

6 30- 35 cm

Line drawing of a car interior frame with no text or symbols

Line drawing of a car interior showing seat, dashboard, and seatbelt (no text or symbols)

Line drawing of a car's front and side panels showing structural details (no text or symbols)

Line drawing of a car interior compartment showing handle and seat (no text or symbols)

Line drawing of hands installing or adjusting a component on a vehicle chassis (no text or symbols)

Line drawing of hands installing or adjusting a component on a vehicle (no text or symbols visible)

Illustration of hands using a tool to adjust or install a mechanical component (no text or symbols visible)

Interior view of a car showing hands cleaning the dashboard with a tool (no text or symbols visible)

Line drawing of hands installing or adjusting a component inside a car gear (no text or symbols)

16 - - - - -

Line drawing of a car interior showing a cable, seatbelt, and camera (no text or symbols)

18

MSH300 bk 5 A og +12 V (15) bd +12 V (30) (31) 5 A bd 15 A R L bu bu R L

19
MSH301

bu R L bu 5 A og +12 V (15) 15 A bk rd +12 V (30) (31)

	EN DE FR ES PT IT NL DA SV
bu Blue	Blau Bleu	Azul Azul	Blu Blauw	Blå Blå
og	Orange	Orange	Orange	Naranja	Cor de laranja	Arancione	Oranje	Orange	Orange
rd	Red	Rot	Rouge	Rojo	Vermelho	Rosso	Rood	Rød	Röd
bk	Black	Schwarz	Noir	Negro	Preto	Nero	Zwart	Sort	Svart

	NO	FI	RU	PL	SK	CS	HU
bu	Blå	Sininen	Синий	Niebieski	Modrá	Modrá	Kék
og	Oransje	Oranssi	Оранжевый	Pomarańczowy	Oranžová	Oranžová	Narancs
rd	Rød	Punainen	Красный	Czerwony	Červená	Červená	Piros
bk	Svart	Musta	Черный	Czarny	Čierna	Černá	Fekete

20

Line drawing of a car dashboard and steering wheel (no text or symbols)

21

20 mm

22

2 1

Please read this instruction manual carefully before installation and first use, and store it in a safe place. If you pass on the product to another person, hand over this instruction manual along with it.

Contents

1 Explanation of symbols....10
2 Safety and installation instructions ....10
3 Scope of delivery .....13
4 Intended use....13
5 Technical description .....14
6 Installing the seat heater....14
7 Using the seat heater ....18
8 Guarantee....19
9 Disposal....19
10 Technical data....19

1 Explanation of symbols

WARNING!

Safety instruction: Failure to observe this instruction can cause fatal or serious injury.

NOTICE!

Failure to observe this instruction can cause material damage and impair the function of the product.

NOTE

Supplementary information for operating the product.

2 Safety and installation instructions

Please observe the prescribed safety instructions and stipulations from the vehicle manufacturer and service workshops.

The manufacturer accepts no liability for damage in the following cases:

• Faulty assembly or connection
- Damage to the product resulting from mechanical influences and excess voltage
• Alterations to the product without express permission from the manufacturer
- Use for purposes other than those described in the operating manual

NOTICE!

To prevent the risk of short circuits, always disconnect the negative terminal of the vehicle's electrical system before working on it.

If the vehicle has an additional battery, its negative terminal should also be disconnected.

WARNING!

Inadequate supply cable connections could result in short circuits, which could have as a consequence that:

• Cable fires occur
  • The airbag is triggered
  • Electronic control devices are damaged
  • Electric functions fail (indicators, brake light, horn, ignition, lights)

Please observe the following instructions:

- When working on the following cables, only use insulated cable lugs, plugs and flat push-on receptacles:

• 30 (direct supply from positive battery terminal)
• 15 (connected positive terminal, behind the battery)
• 31 (return cable from the battery, earth)

Do not use terminal strips.

- The safest type of connection is to solder the ends of the cables together and then insulate them.

Only use insulated cable terminals, plugs and flat sockets for releasable connections. Do not use crimp terminals (cable connectors) or terminal strips.

- Use a crimping tool (fig. 1 10, page 3) to connect the cables.

- When connecting to cable 31 (earth), screw the cable

• To the vehicle's earth bolt with a cable lug and a gear disc or
• To the sheet-metal bodywork with a cable lug and a self-tapping screw.

Ensure that there is a good earth connection.

If you disconnect the negative terminal of the battery, all data stored in the volatile memories will be lost.

- The following data must be set again, depending on the vehicle equipment options:

• Radio code
• Vehicle clock
• Timer
• On-board computer
• Seat position

You can find instructions for making these settings in the appropriate operating instructions.

Observe the following installation instructions:

• Secure the parts installed in the vehicle in such a way that they cannot become loose under any circumstances (sudden braking, accidents) and cause injuries to the occupants of the vehicle.
• To prevent damage, when drilling ensure that there is sufficient space on the other side for the drill head to come out (fig. 2, page 4).
• Deburr all drill holes and treat them with a rust-protection agent.

Observe the following instructions when working with electrical parts:

- When testing the voltage in electrical cables, only use a diode test lamp (fig. 1 8, page 3) or a voltmeter (fig. 1 9, page 3).

Test lamps with an illuminant (fig. 1 12, page 3) take up voltages which are too high and which can damage the vehicle's electronic system.

- When making electrical connections (fig. 3, page 4), ensure that

– They are not kinked or twisted

- They do not rub on edges

– They are not laid in sharp-edged ducts without protection.

• Insulate all connections.

- Secure the cables against mechanical wear with cable binders or insulating tape, for example to existing cables.

Observe the following instructions when using the seat heater:

- Do not place any sharp or heavy objects on the seat, as the seat heater could otherwise be damaged.

- Persons with an impaired sensitivity to heat should only operate the seat heating on level 1.

- Do not place any heat insulating objects, such as blankets or coats, on the seat when the seat heater is switched on.

- The seat heater can be damaged by fluids spilt on the seat.

- Never switch the seat heater on when it is wet.

3 S c o p e o f d

No. in fig. 4, page 4
Quantity Designation Ref. no.
MSH300 MSH301

1 2 1 Seat surface heating element 9101700038
2 2 1 Backrest heating element 9101700039
3 2 1 Switch 9101700041
4 1	1 Set of connecting cables (black: right side blue: left side)		9101700053
5 1	1 Switchbox	9101700051
-	1	1 Drill template
-	12	6	Double-sided adhesive tape
-	12	6	Insulating material
-	1	1 Operating manual

4 Intended use

The MagicComfort seat heating MSH300 (ref. no. 9600000395) and MSH301 (ref. no. 9600000396) are suitable for installation in the front vehicle seats of passenger vehicles, transporters and caravans.

NOTICE!

For vehicles equipped with side airbags in the seat backrests, seat occupancy detection or child seat detection, observe the vehicle manufacturer's specifications.

5 Technical description

The heating elements for the MagicComfort seat heating MSH300 and MSH301 can be installed in the driver's seat and in the passenger seat.

The shape of the seat is not altered by the heating elements.

The seat heater is operated using a switch.

6 Installing the seat heater

6.1 Tools required (fig. 1, page 3)

For installation and assembly you will need the following tools:

• Drill bit set (1)
• Drill (2)
• Screwdriver (3)
• Set of ring or open-ended spanners (4)
• Measuring ruler (5)
• Hammer (6)
• Centre punch (7)

To make and test the electrical connection, the following tools are required:

• Diode test lamp (8) or voltmeter (9)
- Crimping tool (10)
- Insulating tape (11)
- Hot air blower (13)
- Soldering iron (14)
- Solder (15)
- Cable bushing sleeves (if necessary)

To fasten the cables you may require additional cable binders.

6.2 Installing the seat heater

Removing the seat

▶Secure the vehicle against rolling away.

NOTICE!

For vehicles with side air bags in the seat backrest, observe the manufacturer's instructions on removing the seats and the upholstery.

▶ Check the suitability for installation using these installation instructions and the manufacturer's information.
▶Remove the fastening screws from the vehicle seat.
▶ Lift the seat out of the vehicle.

Preparing the seat

▶Remove all plastic panelling from the seat to ensure the fastening of the cover fabric can be reached.
Separate the backrest from the seat (fig. 7, page 5 and fig. 8, page 5).
▶Open the seat cover on the seat surface.

The cover fabric is usually tucked into a seam on the frame with a wide cardboard strip or metal wire.

Remove the fasteners using a screwdriver and pliers (fig. 9, page 5 and fig. 10, page 5).
▶ Remove any upholstery staples or cross braces (fig. 11, page 5).
▶Open the cover of the backrest in the same way.

Preparing the heating elements

NOTICE!

Insulate all the trimmed ends with the insulating material supplied to prevent a short circuit.

NOTE

• You can cut the heating elements to the required length and shorten the lengths of the two conductor paths.
• You can cut out a section of the heating element in the area of the anchoring grooves on the seat or the backrest. Make sure the cut-out sections are only made between the two black seams (fig. 5, page 4).
• Do not cut the mat lengthways, otherwise it will not be heated in the area of the incision (fig. 5, page 4).
• The heating surface on the backrest only needs to extend approx. 30 – 35 cm above the seat, as the driver only leans against this area when sitting normally (fig. 6, page 4).

▶Place the heating elements on the seat and backrest.
▶ If there are anchoring grooves in the seat or the backrest, mark these areas on the heating elements.
▶Mark the required lengths. Take into account the depth of the anchoring grooves, if present. The heating element is inserted in these anchoring grooves.
▶Trim the heating element to the required length.
▶Customise the cut-out sections as required.
▶ Insulate all the trimmed ends with the insulating material.

Installing the heating element for the seat surface

▶ Insert the heating element for the seat surface between the cover fabric and the foam core of the seat (fig. 12, page 5).
If anchoring grooves are present, make sure that the cut-out sections are positioned over the anchoring grooves (fig. 13, page 5) and place the heating elements in the anchoring grooves.
▶ Fasten the heating element using double-sided adhesive tape to prevent it sliding on the foam core.
Ensure that no creases or kinks form.

Installing the heating element for the backrest

NOTICE!

If the seats are equipped with side airbags, then there is a predetermined breaking point in the cover fabric. The seat cover must therefore not be pulled tightly or slip out of place.

▶ Open the lower area of the backrest cover (fig. 14, page 5).
▶Push the heating element into the gap between the seat cover and the seat cushion (fig. 15, page 5).
▶Fasten the heating element using double-sided adhesive tape to prevent creases.

Installing the seat

▶Reassemble the backrest and seat.
▶ Lift the seat into the vehicle.
▶Secure the vehicle seat with the fastening screws.

Electrical connection

MSH300

The complete circuit diagram can be found in fig. 18, page 6.

MSH301

The complete circuit diagram can be found in fig. 19, page 7.

NOTICE!

Ensure it has been securely fitted, particularly in the area of the seat rails.

▶ Attach the switchbox to a suitable location in the vicinity of the dashboard (fig. 20, page 8).
▶ Find a suitable place for installing the seat heater switch.
If possible, use the blanking plugs provided for this purpose.
Ensure that there is enough room behind the panel for the installation of the switch.
▶ Mark the switch cut-out using the template provided (fig. 21, page 8).
▶Cut out the marked area with an appropriate tool.
▶ Install the switch into the cut-out (fig. 16, page 5).
▶ Install the ready-made wiring harness so that the cables cannot bend or fray (fig. 17, page 5).

7 Using the seat heater

NOTE

The seat heating logo (fig. 22 1, page 8) also lights up when the seat heating is switched on.

▶Press the seat heater switch to turn on the seat heater:

• Press once: Level 3 (high heat output)
• Press twice: Level 2 (medium heat output)
• Press three times: Level 1 (low heat output)

√ One, two or three LEDs (fig. 22 2, page 8) on the switch light up in red.

To switch the seat heating off: Press the switch until the LEDs (fig. 22 2, page 8) on the switch go out.

8 G u a r a n t e e

The statutory warranty period applies. If the product is defective, please contact the manufacturer's branch in your country (see the back of the instruction manual for the addresses) or your retailer.

For repair and guarantee processing, please include the following documents when you send in the device:

• A copy of the receipt with purchasing date
- A reason for the claim or description of the fault

9 D i s p o s a l

▶ Place the packaging material in the appropriate recycling waste bins wherever possible.

If you wish to finally dispose of the product, ask your local recycling centre or specialist dealer for details about how to do this in accordance with the applicable disposal regulations.

10 Technical data

	MagicComfort MSH300	MagicComfort MSH301
Ref. no.: 9600000395 9600000396
Operating voltage: 12 V---
Power:	adjustable to three levels, with 10 – 70 W per seat
Max. power consumption:	10 A	5 A
Dimensions:	Seat element: 580 x 270 mmBackrest element: 580 x 270 mm

5 Description technique

Dometic Australia Pty. Ltd.

1 John Duncan Court

Varsity Lakes QLD 4227

1800212121

[phone]

Mail: [e-mail]

AUSTRIA

Dometic Austria GmbH

Neudorferstraße 108

A-2353 Guntramsdorf

[phone]

[phone]

Mail: [e-mail]

BENELUX

Dometic Branch Office Belgium

Zincstraat 3

B-1500 Halle

[phone]

[phone]

Mail: [e-mail]

BRAZIL

Dometic DO Brasil LTDA

Avenida Paulista 1754, conj. 111

SP 01310-920 Sao Paulo

[phone]

[phone]

Dometic Group Asia Pacific

Suites 2207-11 · 22/F · Tower 1

The Gateway · 25 Canton Road,

Tsim Sha Tsui · Kowloon

[phone]

[phone]

Mail: [e-mail]

HUNGARY

Dometic Zrt. Sales Office

Kerékgyártó u. 5.

H-1147 Budapest

[phone]

[phone]

Dometic Italy S.r.l.

Via Virgilio, 3

I-47122 Forlì (FC)

[phone]

[phone]

Mail: [e-mail]

JAPAN

Dometic KK

Maekawa-Shibaura, Bldg. 2

2-13-9 Shibaura Minato-ku

Tokyo 108-0023

[phone]

[phone]

Mail: [e-mail]

MEXICO

Circuito Médicos No. 6 Local 1

Colonia Ciudad Satélite

CP 53100 Naucalpan de Juárez

Estado de México

[phone]

[phone]

Mail: [e-mail]

NETHERLANDS

Dometic Benelux B.V.

Ecustraat 3

NL-4879 NP Etten-Leur

[phone]

[phone]

Mail: [e-mail]

NEW ZEALAND

Dometic New Zealand Ltd.

PO Box 12011

Penrose

Auckland 1642

[phone]

[phone]

Mail: [e-mail]

NORWAY

Dometic Norway AS

∅sterøyveien 46

N-3232 Sandefjord

[phone]

[phone]

Mail: [e-mail]

POLAND

Dometic Poland Sp. z o.o.

Ul. Puławska 435A

PL-02-801 Warszawa

[phone]

[phone]

Mail: [e-mail]

PORTUGAL

Dometic Spain, S.L.

Komsomolskaya square 6-1

RU-107140 Moscow

[phone]

[phone]

Mail: [e-mail]

SINGAPORE

Dometic Pte Ltd

18 Boon Lay Way 06-140 Trade Hub 21

Singapore 609966

[phone]

[phone]

Mail: [e-mail]

SLOVAKIA

Dometic Slovakia s.r.o. Sales Office Bratislava

Nádražná 34/A

900 28 Ivánka pri Dunaji

/ [phone]

Mail: [e-mail]

SOUTH AFRICA

Dometic (Pty) Ltd.

Regional Office

South Africa & Sub-Saharan Africa

2 Avalon Road

West Lake View Ext 11

Modderfontein 1645

Johannesburg

[phone]

[phone]

Mail: [e-mail]

SPAIN

Dometic Spain S.L.

Avda. Sierra del Guadarrama, 16

E-28691 Villanueva de la Cañada

Madrid

[phone]

[phone]

Mail: [e-mail]

SWEDEN

Dometic Scandinavia AB

Gustaf Melins gata 7

Dometic Switzerland AG

Riedackerstrasse 7a

CH-8153 Rümlang

[phone]

[phone]

Mail: [e-mail]

UNITED ARAB EMIRATES

Dometic Middle East FZCO

P.O.Box17860

S-D 6, Jebel Ali Freezone

Dubai

[phone]

[phone]

Mail: [e-mail]

UNITED KINGDOM

Dometic UK Ltd.

Dometic House, The Brewery

Blandford St. Mary

Dorset DT119LS

[phone]

[phone]

Mail: [e-mail]

USA

Dometic RV Division

1120 North Main Street

Elkhart, IN 46515

[phone]