AC clicking sound issue

Wilsophia · 04-15-2012, 09:31 PM

Dear all,

Mine is 02 c32 and 68000km mileage. Starting to have clicking noise inside the dash for 20-30 seconds when car just start up. The AC no cold at first 20-30 minutes. Searched some threads and know it should be the famous common fault for earlier w203, the AC flaps linkage / stepping motors breakage.....

Noisy Air Conditioner ?? Stepper Motor Replacement / Clicking & Hissing

Understand the instruction how to replace them from the web link and I have planned to replace all the linkage, but I would like to ask:
1) how many linkage totally needed for C32AMG?
2) how many pieces of motor linkage in one bag of PN:203 830 00 33 ?
3) all the linkage in diff steeping motor are the same ?

Please advise

Regards

Wilsophia

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Glyn M Ruck · 04-15-2012, 10:16 PM

Here we go:

Usually 2 per pack but please check with vendor! All the same.

SunnyRayToronto · 04-16-2012, 01:13 AM

Mercedes-Benz Part#: A203-830-00-33
HVAC Control Lever Kit For Left/Right Footwell Flap Levers Contains: (2) Control Levers
NOTE: Of the two, there is a Right and Left
About $20US

Mercedes-Benz Part#: A203-830-00-32
HVAC Linkage Kit For Non-Footwell Flap Operating Levers NOTE: Does not contain the Control Levers (ie, the two common breakage mentioned above in A203-830-00-33)
"Bag Of Thingies" Something like 10 or 13 various shaped pieces
About $66US

Glyn M Ruck · 04-16-2012, 10:13 AM

Thanks SRT - you are a star!

Wilsophia · 04-16-2012, 10:17 AM

That means this bag of 2 linkages are only for M2/10 and M2/11 stepping motors, how about the other 8 motor linkages? Should the need to replace together?

Glyn M Ruck · 04-16-2012, 10:51 AM

10 A 209 830 01 62 EVAPORATOR HOUSING
AIR CONDITIONER Code: 580
001 L
10 A 209 830 00 62 EVAPORATOR HOUSING
AIR CONDITIONER Code: 580
001 R
10 A 209 830 03 62 EVAPORATOR HOUSING
AUTOMATIC AIR CONDITIONER Code: 581
001 L
10 A 209 830 02 62 EVAPORATOR HOUSING
AUTOMATIC AIR CONDITIONER Code: 581
001 R
20 A 203 830 01 33 .OPERATING LEVER
LEFT [003]
001
30 A 203 830 02 33 .OPERATING LEVER
RIGHT [003]
001
35 A 001 984 58 29 .SCREW
M4X16 041
35 A 001 984 58 29 .SCREW
M4X16 Code: 581
052
45 A 000 835 31 34 .SPRING NB
60 A 203 835 06 98 .SEAL
CONDENSED WATER DRAIN 001
70 A 203 830 21 18 .CANISTER Code: 581
001
80 A 203 830 12 03 .HOUSING
ACTIVATED CHARCOAL FILTER Code: 581
001
90 A 203 830 07 40 .AIR DUCT
LEGROOM,LEFT [003]
001
100 A 203 830 08 40 .AIR DUCT
LEGROOM,RIGHT [003]
Code: 580
001
100 A 203 830 08 40 .AIR DUCT
LEGROOM,RIGHT Code: 581
001
110 A 203 830 00 32 .LINKAGE
FOOTWELL FLAPS WITHOUT OPERATING LEVER 001
115 A 203 830 00 33 .OPERATING LEVER
LEGROOM,LEFT AND RIGHT 001
120 A 203 830 01 03 .HOUSING
AIR DISTRIBUTOR [409]
Code: -581
001 L
120 A 203 830 02 03 .HOUSING
AIR DISTRIBUTOR [409]
Code: -581
001 R
120 A 203 830 23 03 .HOUSING TOP SECTION
AIR DISTRIBUTOR [409]
Code: 581
001 L
120 A 203 830 24 03 .HOUSING
AIR DISTRIBUTOR Code: 581
001 R
130 A 203 830 05 03 .HOUSING
BLOWER SIDE 001 L
130 A 203 830 05 03 .HOUSING
BLOWER SIDE Code: 580
001 L
130 A 203 830 07 03 .HOUSING
BLOWER SIDE Code: 581
001 L
130 A 203 830 06 03 .HOUSING
BLOWER SIDE 001 R
130 A 203 830 06 03 .HOUSING
BLOWER SIDE Code: 580
001 R
130 A 203 830 08 03 .HOUSING
BLOWER SIDE Code: 581
001 R
140 A 203 830 26 03 .HOUSING
FRESH AIR/CIRCULATING AIR Code: 580
001 L
140 A 203 830 14 03 .HOUSING
FRESH AIR/CIRCULATING AIR Code: 581
001 L
140 A 203 830 19 03 .HOUSING
FRESH AIR/CIRCULATING AIR Code: 581
001 R
140 A 203 830 28 03 .HOUSING
FRESH AIR/CIRCULATING AIR [006]
Code: 580
001 R
145 A 203 997 00 25 .EXPANSION PLUG
BLOWER CASE 001
150 A 203 835 00 93 .VAPOUR BARRIER 002
200 A 203 830 01 61 .HEAT EXCHANGER 001
205 A 203 835 00 14 .HOLDER
HEAT EXCHANGER 001
210 A 203 830 16 15 .PIPE LINE 001 L
215 A 203 830 17 15 .PIPE LINE 001 R
220 A 006 997 33 48 .SEALING RING
Replaced_By: A 000 835 37 98 001
220 A 000 835 37 98 .ROUND SECTION SEAL RING 001
225 A 203 835 00 11 .PLATE
PIPE LINE FIXTURE 001 L
230 A 209 830 01 58 .EVAPORATOR
PIPE LINE CONNECTION
18MM [003], [007]
001 L
230 A 209 830 02 58 .EVAPORATOR
PIPE LINE CONNECTION
18 MM [003], [007]
001 R
240 A 230 830 01 84 .VALVE
PIPE LINE CONNECTION
18MM [008]
001
250 A 140 997 09 45 .SEALING RING
17X2 MM 001
260 A 140 997 07 45 .SEALING RING
10.6X2 001
270 A 203 835 03 98 .SEAL
FIRE WALL 001 L
270 A 203 835 05 98 .SEAL
FIRE WALL 001 R
280 A 220 830 07 72 .TEMPERATURE SENSOR 001
290 A 203 830 12 15 .WIRING HARNESS
SERVOMOTOR 001 L
290 A 203 830 14 15 .WIRING HARNESS
SERVOMOTOR 001 R
290 A 203 830 13 15 .WIRING HARNESS
SERVOMOTOR Code: 581
001 L
290 A 203 830 15 15 .WIRING HARNESS
SERVOMOTOR Code: 581
001 R
300 A 203 835 01 11 .PLATE 001 R
310 A 203 820 16 42 .STEPPER MOTOR [006]
Code: 580
006
310 A 203 820 16 42 .STEPPER MOTOR
AUTOMATIC AIR CONDITIONER Code: 581
010
320 A 230 821 63 51 .BLOWER REGULATOR 001
330 A 203 820 25 14 .ELECTRIC MOTOR
BLOWER 001 L
330 A 203 820 26 14 .ELECTRIC MOTOR
BLOWER REGULATOR 001 R
360 A 203 830 00 08 BLOWER MOTOR
FOR CENTER CONSOLE [011]
Code: 589
001
370 A 220 820 92 10 BLOWER REGULATOR
IN CENTRAL CONSOLE [011]
Code: 589
001
390 A 203 835 01 19 COVER
BOTTOM [011]
Code: 589
001
400 A 203 835 01 98 SEAL
Replaced_By: A 203 835 14 98 001
400 A 203 835 14 98 SEAL 001
410 N 910104 4006000 MULTIPLE NUT
HEATER BOX
M6 003
420 A 211 830 05 72 SENSOR
ANTI-ICING 001
420 A 211 830 05 72 SENSOR
ANTI-ICING Code: 580
001
420 A 203 837 01 10 COVER
WITH ANTI-ICING PROTECTION SENSOR Code: 580
001
430 A 203 832 13 94 HOSE
CONDENSED WATER DRAIN 002
440 A 203 830 36 03 HOUSING
AIR DISTRIBUTOR [015]
001
440 A 203 830 36 03 HOUSING
AIR DISTRIBUTOR [018]
Code: 581
001
460 A 203 835 00 35 CAP
AIR DISTRIBUTOR Code: 970/974/975
002
470 A 203 835 01 14 HOLDER
HOUSING FASTENING 001

Replacing a mechanisms is a very large job.

Wilsophia · 04-16-2012, 11:08 AM

Then the famous click click sound issue are only related to 2 footwell flap linkages? 203 830 00 33 ? Any ideas of the 203 830 00 32 ?

SunnyRayToronto · 04-16-2012, 01:07 PM

From the link you provided, did you do the Resynch (pressing ReCirculation & FrontDefroster together)? If you have a problem, the ReSynch shouldn't stop.

Play with vent selector and feel for air coming out of all vents. Regardless of which vent selector choosen, your foot vent should always be stuck open or stuck closed,... signaling a broken footwell flap linkage (A203 830 00 33 HVAC Control Lever Kit For Left/Right Footwell Flap Levers Contains: 2 Control Levers) which causes the "clicking" sound about every 5 seconds for about a minute at startup.

The other A203 830 00 32 (HVAC Linkage Kit For Non-Footwell Flap Operating Levers NOTE: Does not contain the footwell Control Levers). Basically, the Footwell Control Levers are such a common breakage due to the original poor design that Mercedes-Benz sell them separately as a pair (A203 830 00 33). The A203 830 00 32 contains all HVAC Linkage Kit Flap Operating Levers EXCEPT the footwel flap operating levers; there's about 10-13 little plastic pieces, so if you only need one, you have to buy the entire bag. Mercedes-Benz Stealerships must be making a killing on replacing these parts since each bag contains over 10 pieces and they only need one for each repair but keep the other pieces for later to use on another car but in the meantime charging each repair the full price ($66) for this bag of at least 10 pieces.

Your AC not working in the first 20-30 minutes is a separate issue than the footwell vent being stuck open/closed resulting in that clicking at 5 second intervals for first minute at startup. The A203 830 00 32 (10-13 peices of non Footwell linkage) probably won't fix your AC problem but since this 6 hour job will have the dash apart, it might not be a bad idea to replace these parts too.

Remember, its rarely the stepper motor thats broken, its usually one of these plastic linkages.

hanknum · 04-17-2012, 03:59 PM

I need to do this too.

04-15-2012, 10:16 PM	#2
Glyn M Ruck Super Moderator 1965 Jaguar 3.8 S Type Join Date: Jun 2008 Location: Llandudno, Cape Town, South Africa Posts: 15,844 Drives: late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires	C32/320 HVAC stepper motors Here we go: Usually 2 per pack but please check with vendor! All the same. Attached Thumbnails __________________ Llandudno, Cape Town, South Africa

04-16-2012, 01:13 AM	#3
SunnyRayToronto Super Member Garage is empty, add now Join Date: May 2009 Location: Toronto, Ontario, Canada, eh! Posts: 654 Drives: 2003 C230 Sports Coupe, Paprika Metallic Red, Auto, Pano, Leather	Mercedes-Benz Part#: A203-830-00-33 HVAC Control Lever Kit For Left/Right Footwell Flap Levers Contains: (2) Control Levers NOTE: Of the two, there is a Right and Left About $20US Mercedes-Benz Part#: A203-830-00-32 HVAC Linkage Kit For Non-Footwell Flap Operating Levers NOTE: Does not contain the Control Levers (ie, the two common breakage mentioned above in A203-830-00-33) "Bag Of Thingies" Something like 10 or 13 various shaped pieces About $66US Last edited by SunnyRayToronto; 04-16-2012 at 12:50 PM.

04-16-2012, 10:13 AM	#4
Glyn M Ruck Super Moderator 1965 Jaguar 3.8 S Type Join Date: Jun 2008 Location: Llandudno, Cape Town, South Africa Posts: 15,844 Drives: late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires	Thanks SRT - you are a star! __________________ Llandudno, Cape Town, South Africa

04-16-2012, 10:51 AM	#6
Glyn M Ruck Super Moderator 1965 Jaguar 3.8 S Type Join Date: Jun 2008 Location: Llandudno, Cape Town, South Africa Posts: 15,844 Drives: late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires	10 A 209 830 01 62 EVAPORATOR HOUSING AIR CONDITIONER Code: 580 001 L 10 A 209 830 00 62 EVAPORATOR HOUSING AIR CONDITIONER Code: 580 001 R 10 A 209 830 03 62 EVAPORATOR HOUSING AUTOMATIC AIR CONDITIONER Code: 581 001 L 10 A 209 830 02 62 EVAPORATOR HOUSING AUTOMATIC AIR CONDITIONER Code: 581 001 R 20 A 203 830 01 33 .OPERATING LEVER LEFT [003] 001 30 A 203 830 02 33 .OPERATING LEVER RIGHT [003] 001 35 A 001 984 58 29 .SCREW M4X16 041 35 A 001 984 58 29 .SCREW M4X16 Code: 581 052 45 A 000 835 31 34 .SPRING NB 60 A 203 835 06 98 .SEAL CONDENSED WATER DRAIN 001 70 A 203 830 21 18 .CANISTER Code: 581 001 80 A 203 830 12 03 .HOUSING ACTIVATED CHARCOAL FILTER Code: 581 001 90 A 203 830 07 40 .AIR DUCT LEGROOM,LEFT [003] 001 100 A 203 830 08 40 .AIR DUCT LEGROOM,RIGHT [003] Code: 580 001 100 A 203 830 08 40 .AIR DUCT LEGROOM,RIGHT Code: 581 001 110 A 203 830 00 32 .LINKAGE FOOTWELL FLAPS WITHOUT OPERATING LEVER 001 115 A 203 830 00 33 .OPERATING LEVER LEGROOM,LEFT AND RIGHT 001 120 A 203 830 01 03 .HOUSING AIR DISTRIBUTOR [409] Code: -581 001 L 120 A 203 830 02 03 .HOUSING AIR DISTRIBUTOR [409] Code: -581 001 R 120 A 203 830 23 03 .HOUSING TOP SECTION AIR DISTRIBUTOR [409] Code: 581 001 L 120 A 203 830 24 03 .HOUSING AIR DISTRIBUTOR Code: 581 001 R 130 A 203 830 05 03 .HOUSING BLOWER SIDE 001 L 130 A 203 830 05 03 .HOUSING BLOWER SIDE Code: 580 001 L 130 A 203 830 07 03 .HOUSING BLOWER SIDE Code: 581 001 L 130 A 203 830 06 03 .HOUSING BLOWER SIDE 001 R 130 A 203 830 06 03 .HOUSING BLOWER SIDE Code: 580 001 R 130 A 203 830 08 03 .HOUSING BLOWER SIDE Code: 581 001 R 140 A 203 830 26 03 .HOUSING FRESH AIR/CIRCULATING AIR Code: 580 001 L 140 A 203 830 14 03 .HOUSING FRESH AIR/CIRCULATING AIR Code: 581 001 L 140 A 203 830 19 03 .HOUSING FRESH AIR/CIRCULATING AIR Code: 581 001 R 140 A 203 830 28 03 .HOUSING FRESH AIR/CIRCULATING AIR [006] Code: 580 001 R 145 A 203 997 00 25 .EXPANSION PLUG BLOWER CASE 001 150 A 203 835 00 93 .VAPOUR BARRIER 002 200 A 203 830 01 61 .HEAT EXCHANGER 001 205 A 203 835 00 14 .HOLDER HEAT EXCHANGER 001 210 A 203 830 16 15 .PIPE LINE 001 L 215 A 203 830 17 15 .PIPE LINE 001 R 220 A 006 997 33 48 .SEALING RING Replaced_By: A 000 835 37 98 001 220 A 000 835 37 98 .ROUND SECTION SEAL RING 001 225 A 203 835 00 11 .PLATE PIPE LINE FIXTURE 001 L 230 A 209 830 01 58 .EVAPORATOR PIPE LINE CONNECTION 18MM [003], [007] 001 L 230 A 209 830 02 58 .EVAPORATOR PIPE LINE CONNECTION 18 MM [003], [007] 001 R 240 A 230 830 01 84 .VALVE PIPE LINE CONNECTION 18MM [008] 001 250 A 140 997 09 45 .SEALING RING 17X2 MM 001 260 A 140 997 07 45 .SEALING RING 10.6X2 001 270 A 203 835 03 98 .SEAL FIRE WALL 001 L 270 A 203 835 05 98 .SEAL FIRE WALL 001 R 280 A 220 830 07 72 .TEMPERATURE SENSOR 001 290 A 203 830 12 15 .WIRING HARNESS SERVOMOTOR 001 L 290 A 203 830 14 15 .WIRING HARNESS SERVOMOTOR 001 R 290 A 203 830 13 15 .WIRING HARNESS SERVOMOTOR Code: 581 001 L 290 A 203 830 15 15 .WIRING HARNESS SERVOMOTOR Code: 581 001 R 300 A 203 835 01 11 .PLATE 001 R 310 A 203 820 16 42 .STEPPER MOTOR [006] Code: 580 006 310 A 203 820 16 42 .STEPPER MOTOR AUTOMATIC AIR CONDITIONER Code: 581 010 320 A 230 821 63 51 .BLOWER REGULATOR 001 330 A 203 820 25 14 .ELECTRIC MOTOR BLOWER 001 L 330 A 203 820 26 14 .ELECTRIC MOTOR BLOWER REGULATOR 001 R 360 A 203 830 00 08 BLOWER MOTOR FOR CENTER CONSOLE [011] Code: 589 001 370 A 220 820 92 10 BLOWER REGULATOR IN CENTRAL CONSOLE [011] Code: 589 001 390 A 203 835 01 19 COVER BOTTOM [011] Code: 589 001 400 A 203 835 01 98 SEAL Replaced_By: A 203 835 14 98 001 400 A 203 835 14 98 SEAL 001 410 N 910104 4006000 MULTIPLE NUT HEATER BOX M6 003 420 A 211 830 05 72 SENSOR ANTI-ICING 001 420 A 211 830 05 72 SENSOR ANTI-ICING Code: 580 001 420 A 203 837 01 10 COVER WITH ANTI-ICING PROTECTION SENSOR Code: 580 001 430 A 203 832 13 94 HOSE CONDENSED WATER DRAIN 002 440 A 203 830 36 03 HOUSING AIR DISTRIBUTOR [015] 001 440 A 203 830 36 03 HOUSING AIR DISTRIBUTOR [018] Code: 581 001 460 A 203 835 00 35 CAP AIR DISTRIBUTOR Code: 970/974/975 002 470 A 203 835 01 14 HOLDER HOUSING FASTENING 001 Replacing a mechanisms is a very large job. Attached Thumbnails __________________ Llandudno, Cape Town, South Africa

04-17-2012, 03:59 PM	#9
hanknum Senior Member Garage is empty, add now Join Date: Jun 2005 Location: So. Cal. Posts: 498 Drives: '02 C320 Wagon, '78 308 GTS, '06 Highlander Hybrid	I need to do this too. __________________ '02 C320 Wagon '78 308 GTS '06 Highlander Hybrid

04-16-2012, 10:17 AM	#5
Wilsophia Member Garage is empty, add now Join Date: Sep 2011 Location: Hong Kong, China Posts: 165 Drives: 2002 W203 C32 AMG / 1997 Toyota Corolla AE110	That means this bag of 2 linkages are only for M2/10 and M2/11 stepping motors, how about the other 8 motor linkages? Should the need to replace together?

04-16-2012, 11:08 AM	#7
Wilsophia Member Garage is empty, add now Join Date: Sep 2011 Location: Hong Kong, China Posts: 165 Drives: 2002 W203 C32 AMG / 1997 Toyota Corolla AE110	Then the famous click click sound issue are only related to 2 footwell flap linkages? 203 830 00 33 ? Any ideas of the 203 830 00 32 ?

04-16-2012, 01:07 PM	#8
SunnyRayToronto Super Member Garage is empty, add now Join Date: May 2009 Location: Toronto, Ontario, Canada, eh! Posts: 654 Drives: 2003 C230 Sports Coupe, Paprika Metallic Red, Auto, Pano, Leather	From the link you provided, did you do the Resynch (pressing ReCirculation & FrontDefroster together)? If you have a problem, the ReSynch shouldn't stop. Play with vent selector and feel for air coming out of all vents. Regardless of which vent selector choosen, your foot vent should always be stuck open or stuck closed,... signaling a broken footwell flap linkage (A203 830 00 33 HVAC Control Lever Kit For Left/Right Footwell Flap Levers Contains: 2 Control Levers) which causes the "clicking" sound about every 5 seconds for about a minute at startup. The other A203 830 00 32 (HVAC Linkage Kit For Non-Footwell Flap Operating Levers NOTE: Does not contain the footwell Control Levers). Basically, the Footwell Control Levers are such a common breakage due to the original poor design that Mercedes-Benz sell them separately as a pair (A203 830 00 33). The A203 830 00 32 contains all HVAC Linkage Kit Flap Operating Levers EXCEPT the footwel flap operating levers; there's about 10-13 little plastic pieces, so if you only need one, you have to buy the entire bag. Mercedes-Benz Stealerships must be making a killing on replacing these parts since each bag contains over 10 pieces and they only need one for each repair but keep the other pieces for later to use on another car but in the meantime charging each repair the full price ($66) for this bag of at least 10 pieces. Your AC not working in the first 20-30 minutes is a separate issue than the footwell vent being stuck open/closed resulting in that clicking at 5 second intervals for first minute at startup. The A203 830 00 32 (10-13 peices of non Footwell linkage) probably won't fix your AC problem but since this 6 hour job will have the dash apart, it might not be a bad idea to replace these parts too. Remember, its rarely the stepper motor thats broken, its usually one of these plastic linkages.

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