SOURCE: My air conditioner won't blow cold air. It just blows air.
Hello I'm a M.B. tech. 1st you need to know why the freon is low. Hopefully it just needs to be serviced. There is a component located in the lf of the engine compartment called a receiver drier. It soaks up the moisture in the freon so the gases can work the way they are supposed to. On this unit there should be 2 switches(I believe they were combined into one switch in 98. 1 switch is a temp switch that operates your electric fans, the other is a compressor cutoff switch. Assuming the compressor is not coming on-take a fused wire and bridge the 2 contacts- If the compressor does not come on at all there is another problem(it is not low on freon. On the condenser there is a high side port(it is the bigger of the 2)By the brake master Cyl.(lf of the engine compartment thereshould be a smaller low side valve in line with the fuel cooler hose. Usually you can hook up a machine to the low port and **** freon in through that port. Assuming you do not have a refrigerant machine. It is very self explanatory on the bottle of r 134a refrigerant which can be purchased at your local auto supply store. I would start with 1 lbs. and add dye with the freon in case there is a big leak. If the system is overcharged it will not cool properly. I believe the system capacity is approx. 2 lbs. Add a few ounces after the first pound until a/c system is cooling properly and the electric fans are also coming on when the system gets to high. If you get a can with a good Gage set on it you should see the high side between 150 and 2000 psi(fan coming on at max. press.) also the low side should read about 35. It is about the temp of the evaporator which is i=located in the dash and the blower blows through this component out through the vents. Hopefully I have been helpful.
SOURCE: my blower motor does not work except on high, 1997
Check for corrosion on leads if you don't mind playing under the dash for the Blower regulator. Sanded down the leads to remove all corrosion, give that a shot before spending $$. Here is a link for you to save some money if your going to replace the Blower regulator (resistor pack) Good luck and hope this helps. http://www.germanautoparts.com/Mercedes/1997/202.028/H2/7542/5588856
SOURCE: the battery for my 1997
Check with a dealer, they can usually get you the code with proof of ownership, although some of them charge for it. I don't know about a MB, but I've had some luck looking on the internet, however they usually give you a flock of codes, and you need to keep on trying until you hit the correct one. Try the dealer first, and see what they will do for you. Good luck!
SOURCE: the c280 just switched of whilst driving just cranks but does not
check fuses under hood and in the trunk or could be a fuel issue or even the battery could cause a problem i had that problem on my 1996 c280 benz and paid 45. just to change a fuse hope that was helpful and good luck
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