malc854
New Member
I need a new aircon expansion valve for my 2006 W203 C220 cdi auto, but its difficult to identify the correct part without buying it from the main agent. Can a member identify the part number, before I dismantle it.?
w203 air conditioning
- Thread starter malc854
- Start date
malc854
New Member
They have been instructed not to show or give out any part numbers without an order and payment
Petrol Pete
Hardcore MB Enthusiast
| 0 | A 209 830 04 58 check prices | EVAPORATOR PIPE LINE CONNECTION  - Ident. end no. | 001 | R | |
| 230 | A 209 830 03 58 check prices | EVAPORATOR PIPE LINE CONNECTION 18MM - Ident. end no. | 001 | L | |
| 240 | A 220 830 03 84 check prices | VALVE PIPE LINE CONNECTION 14MM - Ident. end no. | 001 | ||
| 240 | A 230 830 01 84 check prices | VALVE PIPE LINE CONNECTION 18MM - Ident. end no. | 001 | ||
| 250 | A 140 997 09 45 check prices | O-RING |
Petrol Pete
Hardcore MB Enthusiast
number 240 is the expansion valve . follow the A/C lines in the engine bay . as they pass through the bulkhead the meet at the expansion valve. On most cars they are a pig to change .
Petrol Pete
Hardcore MB Enthusiast
Petrol Pete
Hardcore MB Enthusiast
shown here from engine bay side with no part number allocation.
Petrol Pete
Hardcore MB Enthusiast
Read a workshop manual before doing the job , some need an alignment tool . have not done one myself and am in no rush to change that 
malc854
New Member
Thanks for your help, looks like a tough job but Ive renewed everything else so the problem can now only be the expansion valve, fingers crossed
Phil1968
Active Member
- Joined
- Mar 22, 2015
- Messages
- 592
- Car
- C219 CLS 500, W447 Vito 119 CDI
What symptoms are you experiencing?
malc854
New Member
Fairly even pressure on the high and low side. I have fitted a new condenser w/dryer and pressure switch, as it wouldn't hold gas. The compressor was full of v'dirty oil and had slack in the pulley. There is electrical feed to the compressor.
malc854
New Member
Forgot to mention that I've fitted a new compressor
- Joined
- Mar 12, 2005
- Messages
- 7,612
- Location
- Cheshire, UK
- Car
- C270CDi Estate (late 2004 facelift model) - Bought 2005, Sold 2022.
The a/c has always (I've had the car since it was 5mths old) been a bit rubbish on mine. It chills, but just doesn't get properly cold.
A dealer and the indie have looked at it. Been regassed a few times and had a new condenser. The indie I use lent me an even older pre-facelift W203 and that blew absolutely freezing air - he just shrugged when I pointed out the difference.
A dealer and the indie have looked at it. Been regassed a few times and had a new condenser. The indie I use lent me an even older pre-facelift W203 and that blew absolutely freezing air - he just shrugged when I pointed out the difference.
Phil1968
Active Member
- Joined
- Mar 22, 2015
- Messages
- 592
- Car
- C219 CLS 500, W447 Vito 119 CDI
Makes me wonder if the compressor's actually running if you're getting equal pressures on the low & high side?
malc854
New Member
The air con debacle goes on and on. So far I've renewed all these parts which were in poor condition..... Condenser/dryer, Compressor and the expansion valve. Re gassed and holds pressure. Ive reset the flaps to make sure that the hvac distributes properly, but although the pipes entering/leaving the evaporator I still have no cold air. It seems to start reducing temperature and the fan cuts it ok but then returns to air temperature. There is no noise from an hvac stepper motor. I don't give up easily
Phil1968
Active Member
- Joined
- Mar 22, 2015
- Messages
- 592
- Car
- C219 CLS 500, W447 Vito 119 CDI
Are the pressures still even on the high & low sides?
malc854
New Member
High side is 7 and low side 5, but when engine starts and aircon engaged the high side drops to nowt. The temperature starts to fall by around 5c then returns to air temperature
Phil1968
Active Member
- Joined
- Mar 22, 2015
- Messages
- 592
- Car
- C219 CLS 500, W447 Vito 119 CDI
Measured in Bar I take it? That doesn't make sense. Are you sure you have your gauge lines on the correct way round? I'd expect the low side to drop to nothing (that would indicate a restriction somewhere if you have the correct charge of refrigerant).
malc854
New Member
Yes my friend has an integrated air con machine and the two connectors cant be interchanged. Both pipes into the expansion valve are cold so the only way I can see that I don't get cold air in the cabin is either both 'blend' stepper motors are seized or not being operated or the evaporator is blocked. What do you think?
Phil1968
Active Member
- Joined
- Mar 22, 2015
- Messages
- 592
- Car
- C219 CLS 500, W447 Vito 119 CDI
Both pipes into the expansion valve shouldn't be cold, should be cold after the valve. Sounds like an obstruction before the valve to me, how far back before the expansion valve is the liquid line cold?
