Mercedes 190 E D 201 Heater Core Removal and Install Tutorial
THERE WILL BE A MEMBER TIPS AND TRICKS SECTION LOCATED AT THE BOTTOM OF THIS TUTORIAL YOU ARE IN COURAGED TO READ THE WHOLE TUTORIAL AND THEN SEE WHAT OTHER MEMBERS DID TO MAKE IT AN EASIER TASK.
Steering Wheel
1. Set the front wheels strait disconnect the cable form the negative terminal of the battery. 2. On later models remove the air bag and unbolt the steering wheel. On early models Use a small screw driver and remove the trim motif from the center of the of the steering wheel. 3. Use an Allen wrench socket and extension and remove the wheel retaining bolt. 4. Remove the wheel from the shaft.
Instrument Panel
5. Remove the cover under the dash on the drivers side. Looking under the dash find and remove the left hand air duct. 6. Reach up behind the dash and unscrew the speedometer retaining nut on the back of the instrument panel and detach the cable from the speedometer head. 7. Push out the instrument panel from the rear to release the five retaining clips. 8. Remove the electrical connectors form the instrument panel mark them so u know where they go for reassembly 9. Remove the panel from the car.
Glove Box
10. Pry out the glove box lamp and disconnect it. 11. Remove the 2 screws holding the latch bracket. 12.Remove the plastic clips by prying up on the top to release it and then remove it. 13. Remove the glove box make sure to feed the light wires thru.
Center Dash Console
14. Remove the center vents using a needle nose pliers surrounded by a rag, they just pull out. 15. Locate the bolt located in the slot of the center vent lever with the vents closed remove it. 16. Remove the two screws holding it up to the dash. 17. Remove the two screws holding it to the transmission tunnel on either side this is on the older models only. The later models, slide out the ashtray and removel the two screws this will let the tray come out then there is two more screws attaching it to the rest of the console. 18. Pull the whole unit forward. Unplug the connectors to the rocker switch, the fan switch, the two pushbutton unit connectors, the two ashtray connectors, and anything else you see in the way, including the radio.
Dash
19. Remove the passenger side cover located under the dash it will be held by three screws remove the plastic caps covering the screws to gain access remove the screws then remove panel. 20. Pull back the weather striping on the front pillar on both sides. Remove both front pillar trim panels by prying the clips loose. 21. Remove the retaining screw and remove both speaker grilles. 22. Remove both upper retaining bolt on both sides of the dash adjacent to the speakers. 23. Uses pliers and a cloth pull off the headlight switch knob remove the nut unplug and remove switch. 24. If equipped pry out the headlight beam adjustment switch disconnect and remove making note of connections 25. Pry out rear dome light switch unplug and remove. 26. Remove the 2 side retaining bolt located on each side of the dash at the bottom. 27. Pull the air duct for the passenger side outlet. 28. Disconnect the glove box lamp switch wires. 29. Remove the bolt on the underside of the dash securing it to the body stiffener. 30. Pull the hose off the rear of the center vents. 31. Carefully pry off the ignition trim ring, 32. Remove the retaining bolt form behind the glove box cover and the inner nut at the bottom right hand side. 33. Pull out the demister nozzles on the heater box and remove dash from car slowly making sure that nothing was missed.
Heater Unit
34. Drain the coolant 35. Release the cable retaining tie on the left of the unit and remove the screw on the wiring terminal. 36. Disconnect the blower motor switch connector. 37. Disconnect the vacuum lines and illumination bulb wiring at the rear of the heater controls. 38. Place a drain pan beneath the engine at the rear of the head. 39. Disconnect the heater feed hose at the rear of the cylinder head drivers side. 40. Disconnect the heater return hose at the thermostat housing. 41. Use compressed air to slowly push remaining coolant out of the heater core (matrix). 42. Inside remove the two bolts and separate the return flow pipe at the matrix flange joint. 43. Pull off the right hand air duct at the heater unit below thee feed floe pipe. 44. Remove the two bolts and separate the feed flow pipe from the matrix. 45. Pull off the Left hand air duct at the heater. 46. Force off the feed flow pipe holder at the firewall on the left hand side. 47. Unscrew the mounting bracket nut below the feed floe pipe. 48. Unscrew the right hand mounting bracket nut below the return flow pipe. 49. Unscrew the two mounting nuts at the top of the heater unit. 50. Disconnect the cable at the blower motor slide switch and main air flap. 51. Separate the unit from the mounting studs and remove it. 52. Remove the screws on the heater unit air intake. 53. Carefully pry off the retaining clips along the top, bottom and sides of the unit. 54. Force the connecting linkage out of the left and right hand defogger flap arm. 55. Push back the lock on the left hand defogger flap, while at the same time pulling off the connector linkage lever. 56. Pull off the gaskets on the left and right hand defogger nozzle connections. 57. Push off the connecting levers of the mixed air flaps on the left and right hand levers. 58. Pry the left and right hand mixed air flap connecting lever ball heads off the ball socket. 59. Separate the two halves of the heater unit and remove the mixed air flaps. 60. Remove the heater core frame retaining screws, remove the frame and take out the heater core.
TIPS AND TRICKS SECTION
TIP 1 & 2 COURTESY OF Logon_Bob AKA DAN
1. The Steering Wheel with Airbag -The Dash will come out with the Steering Wheel/ Air Bag still attached, not easy mind you but very doable with no tweaking damage. Apparently it may not be all that tough to remove it, but you have an option with a bit of care.
2. Speedo - Tough to get in there as there is maybe a 1/2" give in the cable to allow the cluster to move out enough for room and to see what you're doing. If you go to the Trans there is clip, remove the clip and this gets you about another inch or so , enough to once you feed to slack threw the the Fire Wall you can now see between the dash and cluster. Never pull too hard on the speedo cable itself.
__________________ Why dream of just any vehicle, when you can dream of owning one that was never imported.
Last edited by HATTENATOR : 01-28-2008 at 11:02 PM.
Thanks 190ED for your reply. I hope it helps some members. I have seen many questions about console remove, dash remove and heater core removal so i thought what the heck do a set by step on how to do each one. I also have a trouble shooting tutorial on the tempmatic system I did. I have been there before not knowing what to do or how to do it so I like to help when I can.
As a note I need to add that there is changes, as most 190 owners know from early years to latest and each perosns individual 190E may be a little different then eather Tutorial but it will give them the bases of how to do it.
If it goes ok and the forum is ok with it I will probabaly write some tutorials on some other common isses with the 190E.
__________________
Jippi Jak
Totaled 6-27-05: 1985 MB 190e 2.3
1987 MB 190e 2.3-- sold
1993 MB 190E 2.3---work in progress
1996 Volvo 855 GLT
I need a benz bad........
I would add a couple of other twists from when I did mine. Now mine is a 92 2.3, auto/ Calif. From what I gathered with some other How To's, there might be better access with say early models.
1. The Steering Wheel with Airbag - Some How To's said you HAD to remove it perios and some said you didn't. I was all for not removing the air bag after reading the manual unless I had to. The Dash will come out with the Steering Wheel/ Air Bag still attached, not easy mind you but very doable with no tweaking damage. Apparently it may not be all that tough to remove it, but you have an option with a bit of care.
Speedo - Disconnecting the Speedo was the toughest part of the job for me. There is just way too much stuff in the way to reach up from below on mine. I couldn't even get close. One How To was the same, remove the left vent, then you can detach the duct and it will drop enough to allow you enter threw the left vent over the duct.
Still tough to get in there as there is maybe a 1/2" give in the cable to allow the cluster to move out enough for room and to see what you're doing. If you go to the Trans there is clip, remove the clip and this gets you about another inch or so , enough to once you feed to slack threw the the Fire Wall you can now see between the dash and cluster. Never pull too hard on the speedo cable itself.
Check out the tips and tricks section I added U got the first two slots. I think this will help, as members post there tips on this process I will add them to the T&T section of the tut
Check out the tips and tricks section I added U got the first two slots. I think this will help, as members post there tips on this process I will add them to the T&T section of the tut
Thanks Dan for the Tips
Thanks in advance to all members who post a tip
Cool...
Pic, "Dash Out", this doesn't show the Steering Wheel still attached, but I assure you it is.
Thanks Hattenator.
Your tutorial gave me the encouragement I needed to tackle this job. It only took me a few weeks to get the core out of my 1991 190e 2.3. Yes I am slow and I hope I can remember how it all goes back together again.
Here is what happened: wife was driving home alone at about 40mph when the core blew instantly. Scared the heck out of her because the windows fogged up so fast she almost did not pull over before hitting something. At first she thought the car was on fire and so did a trucker who pulled over with his extinguisher. When she realized it was just steam she cleaned the windshield and called me.Being that she was only a few blocks from home I encouraged her to try to get it home. She made it and left a trail of coolant for 1/2 mile.
The core has a two inch hole in it at the seam of plastic and aluminum. Anyone have that happen to them so suddenly and catastrophically? Coolant was everywhere in the cabin, all the way to the back seats and totally soaked the carpeting. I had to remove all of that and all of the flooring pieces to get a sponge in the nooks and crannies. That stuff never dries up by itself. What a mess
As soon as I order a new core (MBParts has one for $120 and another one for $140 any difference in quality?) I will try to put everything back. It's kinda like Spock's Brain.
By the way, I did not have to remove the steering wheel.
Why dream of just any vehicle,
when you can dream of owning one that was never imported.
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