Buy OEM Mercedes-Benz A/C and Heating Parts
The heater in your Mercedes-Benz not warming things up? Maybe the air conditioner isn't blowing cold? Most likely, one or another part needs replacing -- something you should do sooner rather than later, to keep spiraling repair costs down. Good thing you came to us here at MB Part Source; we stock replacement heating and AC parts for all Mercedes-Benz models, at competitive prices. Order today, and we'll ship fast, anywhere nationwide; you'll have repairs done in no time. Contact us with any questions.
Receptacle Housing
Mercedes-Benz
012-545-34-28
Inboard/heater-operation cable-harness plug-connection. 12-pin.
$7.75
MSRP $10.50
Save $2.75
26.2% Off 
Housing For Preheater
Mercedes-Benz
272-203-01-73
At timing case cover. Cooling water pre-heater. Preheater.
$46.80
MSRP $65.00
Save $18.20
28% Off 
Coupling, Mechanical
Mercedes-Benz
023-545-86-26-64
Stationary heater radio rec. A6/1*2. 1-pin.
$3.44
MSRP $4.70
Save $1.26
26.8% Off 
Turn Retainer, Fastener
Mercedes-Benz
140-988-55-78
At blower. Series resistor cable harness to heater case.
$7.26
MSRP $10.00
Save $2.74
27.4% Off 
Fillister HD Screw
Mercedes-Benz
000000-008352
Holder to heater Diameter: 6mm Thread code letter: DBL9441.50.
$2.46
MSRP $3.40
Save $0.94
27.6% Off 
Receptacle Housing
Mercedes-Benz
012-545-53-26
Day driving light relay. Seat heater control relay 1.
$9.23
MSRP $12.50
Save $3.27
26.2% Off 
Hose
Mercedes-Benz
203-506-21-35-64
Line to compensating tank, water pump and heater unit.
$111.60
MSRP $155.00
Save $43.40
28% Off Hose
Mercedes-Benz
203-506-33-35
Line to compensating tank, water pump and heater unit.
$155.04
MSRP $228.00
Save $72.96
32% Off 
Heat Exchanger
Mercedes-Benz
221-830-09-61
Washer fluid heater to a 221 869 07 20.
$169.86
MSRP $250.00
Save $80.14
32.1% Off 
Holder
Mercedes-Benz
140-835-18-14
Additional blower to condenser. Additional blower to additional blower.
$10.82
MSRP $15.00
Save $4.18
27.9% Off 
Rubber Insert
Mercedes-Benz
1635010181
Radiator bottom. At condenser. Lower cooler. Radiator to support.
$8.98
MSRP $12.50
Save $3.52
28.2% Off 
Wiring Harness
Mercedes-Benz
251-540-03-06
Auxiliary heater. Heater booster n33/4-f33-w52/7.
$43.20
MSRP $60.00
Save $16.80
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Mercedes-Benz AC and Heating FAQ
Why is the HVAC in My Mercedes-Benz Not Working Right?
Most likely, because of low or leaking coolant, a failed heater core, a defective AC compressor, or a bad AC condenser. You'll know one from the other by some key symptoms.
How Can I Tell if My Coolant's Low or Leaking?
Start your engine, setting the air conditioner and fans to max/high and listening for the compressor clutch to click. If the system runs too fast, the coolant's probably low. If your Mercedes-Benz isn't due for air conditioning service anytime soon, a leak's likely.
What are the Signs of Heater Core Failure?
The heater not blowing warm, the interior being steamy or smoky, the smell of coolant in the car, and the engine overheating. The core's hoses are the likely problem; they're probably leaking. If you need help with this or any other repairs, get in touch with a Mercedes-Benz service center.
How Can I Diagnose an AC Compressor Defect?
Look, listen, and feel. If the air conditioning sounds funny, if the cabin's warmer than usual, and if the AC clutch is stuck, it's probable. You'll know a bad clutch from connecting a voltmeter and getting no reading. Other causes of compressor trouble include low refrigerant pressure, a faulty cycling switch, and a blown fuse.
How Can I Tell if the AC Condenser in My Mercedes-Benz is Bad?
You'll know it from the HVAC warning light being lit, from frost starting to build up, from the AC button flashing, from the system having discharge pressure issues, and from the vents not blowing cold. If no air's coming through them at all, though, the blower motor's probably gone out. Other reasons for condenser issues include a failed cooling fan and a clogged cabin air filter.