QuestionI have a dark grey 1991 Mercedes-Benz 190E (W201) 1.8 Petrol that has covered 155,000 miles. I recently had the car checked at my local MB dealer because I am very cold when driving becasue the interior heater when turned to hot is always cold. The interior only starts to get mildly warm if stationary in traffic and the engine temp rises abaove 80 degrees on the temp guage. The dealer said they found a vacuum leak behind the dashboard and say it will cost a lot of money to replace. What is a vacuum leak and what elso might cause this problem? Why would vacuum leak affect cabin temp?
Any ideas will be greatly appreciated.
AnswerWhat you describe could be:
#1. Heater Valve.
#2. Sampler Blower Motor
#3. Climate Control Unit
For further diagnosis I would need hands on vehicle.
All of this is easy DIY repair.
You may be able to get used parts to save money.
PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1991 Mercedes Benz 190E 2.3
Part: Heater Valve
R3020-20243 Heater Valve IN STOCK $19.82
http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=merc...
PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1991 Mercedes Benz 190E 2.3
Part: Sampler Blower Motor
Note:
For Temperature Sensor Ventilation on roof rail. Draws air from a specific location in vehicle to sample the temperature and relays information to control unit which takes action to correct to desired temperature setting. Optional with 000 830 96 08.
R3011-70122 Sampler Blower Motor IN STOCK $54.88
http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=merc...
Vehicle: 1991 Mercedes Benz 190E 2.3
Part: Climate Control Unit
Select one of the products from below
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Climate Control Unit
Remanufactured
Push-button assembly
Year: 1988-
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Climate Control Unit
Push-button assembly
http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=merc...
