W202 Heater booster - MBClub UK

santefe999 · 03-12-2007, 06:16 PM

Being new to this forum I must apologize, in advance, if I incorrectly complete my first post. My pride and joy is a 2000 W202 C220 CDI which, despite many miles on the clock, runs very well and, basically, will probably end up being cited in divorce proceedings in the not too distant future. Can anyone please tell me where exactly on my vehicle I can find the diesel powered auxiliary booster heater that I would dearly like to work now the mornings are becoming cold and icy. MB want an absolute fortune to replace the unit which will require a second mortgage! If I can find it I may be able to reduce the cost somewhat. Any help or advice would be much appreciated - Santefe999

**jaymanek** · 03-12-2007, 06:21 PM

IIRC its under the nearside wing plastic cover? does it have the switch in the ashtray compartment?

santefe999 · 03-12-2007, 06:52 PM

The switch for it is on the gear lever console, the corner nearest the drivers seat. I know that when the red light is on the unit is switched off but, even with the light out and the temperature below 6c the unit does not work. - santefe999

Diesel Benz · 03-12-2007, 07:31 PM

On a W202 you should find the auxiliary heater just behind the bumper, on the right, if it is the same for RHD cars. The exhaust pipe should be visible under the car, unfortunately you cannot locate it from the exhaust gas coming out.

These units have pretty much issues. On my W221 I've changed the version coding to avoid automatic starting of the heater. Very short trips are bad for the burner.

santefe999 · 03-12-2007, 08:11 PM

Thanks for that. it explains why I can't see it! Do you know if they are made by Eberspacher? I've made some enquiries and they have an authorised agent fairly near. Great forum!! - santefe999

Diesel Benz · 05-12-2007, 08:10 PM

The OEM heater booster should be from Webasto, Thermo Top S on older W202 cars and Thermo Top C on later models. I'm not sure if Eberspächer could be used instead, the local expert should know.

Subyland · 05-12-2007, 08:31 PM

A good Webasto agent should be able to provide you with the info you want. Also, I believe that MB had a kit, for LHD cars at least, which turned the booster heater into a parking heater as well.

santefe999 · 06-12-2007, 02:40 PM

Update - Problem solved! New Webasto heater unit fitted. Initial problems with the small pulse pump that was seized solid but my friendly local garage took it to pieces and freed it off. The system now works perfectly and the water coming out of the unit is VERY hot. Can't believe the difference and a reasonable bill as well. Couldn't be better. Many thanks to all for your help.. Great forum!! - santefe999

Wezzel · 07-12-2007, 07:59 AM

I must get my heater checked. It does work but stinks.

I notice from the Webasto web site that they do remote control systems for auxiliary heaters. I must investigate whether they can be added to the Merc standard fit heaters.

I like the idea of turning on the heater on a snowy winter morning from the comfort of my kitchen before going to work

Diesel Benz · 07-12-2007, 05:19 PM

There are service parts for aux heaters, like burner inserts.

A separate tele-start kit should exist (at least has existed B6 614 00 55 for a W202). The installation guide does not mention any coolant pump, I guess it is included in the car even if it had no timer or tele-start. Should be limited to electronic parts installation only then.

Installation of a non-OEM heater (even if it was the same brand) may not be straightforward for new cars because the heater blower needs to be controlled via CAN bus. The OEM retrofit kit makes it easy.

mightymeatymate · 17-01-2008, 09:47 PM

Does anybody know whether this booster heater on the w202 220cdi can run on veg oil? Also none of the workshop manuals e.g. Haynes mention this heater is there a info sheet or something readily available?

dan1w · 19-01-2008, 07:19 PM

Quote:

Originally Posted by mightymeatymate

Does anybody know whether this booster heater on the w202 220cdi can run on veg oil? Also none of the workshop manuals e.g. Haynes mention this heater is there a info sheet or something readily available?

Do you mean by installing a seperate tank to feed the heater, or are you running your car on veg (apparently not a good idea on common rail diesel engines)?

It doesn't seem to be possible to upload files to the forum but if you PM me your email address I can send you a PDF document with information about the Webasto Thermotop Z, which is most likely what you have.

mightymeatymate · 26-01-2008, 08:21 PM

Hello Dan1w,

I have posted you my email address for the heater info

Regards

Martin

dan1w · 27-01-2008, 06:24 PM

email sent martin

dan1w · 27-01-2008, 06:33 PM

Martin, my email came back saying 'unknown user'. I've found a copy of the document on the internet which you can view here http://offroadbutikk.com/acatalog/Thermotop_C.pdf

Hope that helps.

03-12-2007, 06:16 PM	#1
santefe999 New Member Join Date: May 2007 Location: Canterbury, Kent. Car: C220 CDI Posts: 18	W202 Heater booster Being new to this forum I must apologize, in advance, if I incorrectly complete my first post. My pride and joy is a 2000 W202 C220 CDI which, despite many miles on the clock, runs very well and, basically, will probably end up being cited in divorce proceedings in the not too distant future. Can anyone please tell me where exactly on my vehicle I can find the diesel powered auxiliary booster heater that I would dearly like to work now the mornings are becoming cold and icy. MB want an absolute fortune to replace the unit which will require a second mortgage! If I can find it I may be able to reduce the cost somewhat. Any help or advice would be much appreciated - Santefe999 Last edited by GRAV888; 03-12-2007 at 06:30 PM. Reason: remove quote button that linked to another forum.

05-12-2007, 08:31 PM	#7
Subyland Hardcore MB Enthusiast Join Date: Oct 2004 Location: Norfolk, UK Car: E320T; E270T CDI; A170L CDI auto; Land Rover Defender 110 Posts: 576	A good Webasto agent should be able to provide you with the info you want. Also, I believe that MB had a kit, for LHD cars at least, which turned the booster heater into a parking heater as well. Last edited by Subyland; 05-12-2007 at 08:34 PM.

07-12-2007, 07:59 AM	#9
Wezzel Hardcore MB Enthusiast Join Date: Jan 2005 Location: West Molesey, Surrey Car: C220 cdi Sport Estate Posts: 366	I must get my heater checked. It does work but stinks. I notice from the Webasto web site that they do remote control systems for auxiliary heaters. I must investigate whether they can be added to the Merc standard fit heaters. I like the idea of turning on the heater on a snowy winter morning from the comfort of my kitchen before going to work Last edited by Wezzel; 07-12-2007 at 07:59 AM. Reason: typo

17-01-2008, 09:47 PM	#11
mightymeatymate New Member Join Date: Jan 2007 Posts: 7	W202 220cdi booster heater on veg oil Does anybody know whether this booster heater on the w202 220cdi can run on veg oil? Also none of the workshop manuals e.g. Haynes mention this heater is there a info sheet or something readily available?

03-12-2007, 06:21 PM	#2
jaymanek Authorised Forum Sponsor Join Date: Nov 2002 Location: Nuneaton Warwickshire Car: Lots of Mercedes! Posts: 14,492	IIRC its under the nearside wing plastic cover? does it have the switch in the ashtray compartment?

03-12-2007, 06:52 PM	#3
santefe999 New Member Threadstarter Join Date: May 2007 Location: Canterbury, Kent. Car: C220 CDI Posts: 18	The switch for it is on the gear lever console, the corner nearest the drivers seat. I know that when the red light is on the unit is switched off but, even with the light out and the temperature below 6c the unit does not work. - santefe999

03-12-2007, 07:31 PM	#4
Diesel Benz Hardcore MB Enthusiast Join Date: Feb 2006 Location: Europe Car: 221.122 & 212.025 & 204.089 Posts: 3,432	On a W202 you should find the auxiliary heater just behind the bumper, on the right, if it is the same for RHD cars. The exhaust pipe should be visible under the car, unfortunately you cannot locate it from the exhaust gas coming out. These units have pretty much issues. On my W221 I've changed the version coding to avoid automatic starting of the heater. Very short trips are bad for the burner.

03-12-2007, 08:11 PM	#5
santefe999 New Member Threadstarter Join Date: May 2007 Location: Canterbury, Kent. Car: C220 CDI Posts: 18	Thanks for that. it explains why I can't see it! Do you know if they are made by Eberspacher? I've made some enquiries and they have an authorised agent fairly near. Great forum!! - santefe999

05-12-2007, 08:10 PM	#6
Diesel Benz Hardcore MB Enthusiast Join Date: Feb 2006 Location: Europe Car: 221.122 & 212.025 & 204.089 Posts: 3,432	The OEM heater booster should be from Webasto, Thermo Top S on older W202 cars and Thermo Top C on later models. I'm not sure if Eberspächer could be used instead, the local expert should know.

06-12-2007, 02:40 PM	#8
santefe999 New Member Threadstarter Join Date: May 2007 Location: Canterbury, Kent. Car: C220 CDI Posts: 18	Update - Problem solved! New Webasto heater unit fitted. Initial problems with the small pulse pump that was seized solid but my friendly local garage took it to pieces and freed it off. The system now works perfectly and the water coming out of the unit is VERY hot. Can't believe the difference and a reasonable bill as well. Couldn't be better. Many thanks to all for your help.. Great forum!! - santefe999

07-12-2007, 05:19 PM	#10
Diesel Benz Hardcore MB Enthusiast Join Date: Feb 2006 Location: Europe Car: 221.122 & 212.025 & 204.089 Posts: 3,432	There are service parts for aux heaters, like burner inserts. A separate tele-start kit should exist (at least has existed B6 614 00 55 for a W202). The installation guide does not mention any coolant pump, I guess it is included in the car even if it had no timer or tele-start. Should be limited to electronic parts installation only then. Installation of a non-OEM heater (even if it was the same brand) may not be straightforward for new cars because the heater blower needs to be controlled via CAN bus. The OEM retrofit kit makes it easy.

26-01-2008, 08:21 PM	#13
mightymeatymate New Member Join Date: Jan 2007 Posts: 7	Hello Dan1w, I have posted you my email address for the heater info Regards Martin

27-01-2008, 06:24 PM	#14
dan1w Member Join Date: Nov 2007 Posts: 50	email sent martin

27-01-2008, 06:33 PM	#15
dan1w Member Join Date: Nov 2007 Posts: 50	Martin, my email came back saying 'unknown user'. I've found a copy of the document on the internet which you can view here http://offroadbutikk.com/acatalog/Thermotop_C.pdf Hope that helps.

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