Yes, I'm the annoying new kid on the board who knows nothing about MBZ, but want to learn!
I just bought a 1989 190e 2.6 VIN#WDBDA29D9KF621994. This is my first MBZ, so I'm basically clueless... I love the car, but I have found that my climate control system is basically just there for looks

First, Air will blow out dash vents ONLY - (Not defroster vents, but "face vents"?)Update: Air flows mainly from dash vents but a slight amount of air is coming out of the defroster vent at all times.

I drove 260 miles to buy the car... When I headed home in it, the outside temp was around 80 degrees. The temperature soon fell below 40 degrees and I found that the heat doesn't work at all in the car! With the dial set to full heat and in any mode, there is no heat coming from any vent anywhere. The heater core cooling hoses ARE connected... So where do I start looking? I did a bit of searching and my head is spinning from all sorts of vacuum diagrams, wiring etc... It's not fun driving in 35 degree weather with no heat and dash vents that will not close... (broken) And yes, the coolant is up to temp and never drops below 80.

Second...
My Oil pressure gauge is erratic (i'm assuming the pressure sensor is faulty... Common?)

My tachometer doesn't move at all. I have checked all fuses and they are fine...
Along with these two cluster issues, I have no outside temp display... It's just blank...


Again, this is my first MBZ and I don't even know where to start looking.
All help is appreciated!
-Doug

I drove in 45 miles in 30 degree weather tonight and my feet are still frozen!
This is my daily driver for now and I need heat! It's gonna be cold in CA for the next week.

Any ideas on how to get my heater up and running again?
I'm desperate and clueless on what to check

First of all, close (shut off) the center vent. It’s designed to only provide fresh air directly from the exterior – so heat will never come out of it.

With the center vents closed, you’ll get a better feel for what’s going on.

Does the fan work?

Post back with results.

Jeff Pierce

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Jeff Pierce

Current Vehicles:
'92 Mercedes 190E/2.3 (247K miles/my daily driver)
'93 Volvo 940 Turbo Wagon (263K miles/a family truckster with spunk)
'99 Kawasaki Concours
Gravely 8120
Previous Vehicles:
'85 Jeep CJ-7 w/ Fisher plow (226K miles)'93 Volvo 940 Turbo Wagon
'53 Willys-Overland Pickup
'85 Honda 750F Interceptor
'93 Nissan Quest
'89 Toyota Camry Wagon
'89 Dodge Raider
'81 Honda CB 750F Super Sport
'88 Toyota Celica
'95 Toyota Tacoma
'74 Honda CB 550F