[babybenz]

I have the same car 1991 190e 1.8 Euro RHD (UK spec)so I'll try to help you as much as I c...

I have the same car 1991 190e 1.8 Euro RHD (UK spec)so I'll try to help you as much as I can.

When I first took over the car, not sure of the previous owner's service history, I did the following as a start :

Ignition stuff : Spark plugs, cables, distributor cap, rotor.

Engine stuff : Fully synthetic oil change, oil filter, air filter, fuel injector cleaner.

The car had no hardstart problems cold or warm.Idling solid.

Then, I had an overheating problem.So I sorted out the auxiliary fan wiring (fan was not turning on).Although the running temps were now better but still close to 100deg C start-stop traffic.I checked and traced a faulty electromagnetic clutch, which was not turning the clutch fan on.Now the running temps in traffic hover between 85 to 90 deg C - never higher.

If your car is running hot when you are stationary, chances are the fan(s) is/are not working.If it runs hot while the car is at speed, normally it's the thermostat that has stuck closed.I am assuming coolant does not leak and the water pump is working.

Car stalling/almost stalling at full steering lock?Check your power steering fluid level.

Please let me know if there is more you wish to know about the car with respect to problems/maintenance/accessories etc.

Cheers.
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[babybenz]

OVP

In my car, the OVP is located to the left of the ECU.

It was a silver relay with black top (and 1 fuse in it when you open the top transparent flip cover).

I swapped it to an upgraded version - silver with red top (and 2 fuses under the top transparent flip cover) to solve an intermittent "stalling when coming to a stop problem.

Here's a photo of the upgraded OVP with red top.

Cheers, my friend.
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[babybenz]

OVP

Good job!

Your first DIY kill!

Cheers, and let us know the results!
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[babybenz]

You should have a tensioner shock for the accessory belt.

My pal's 190E had a failed te...

You should have a tensioner shock for the accessory belt.

My pal's 190E had a failed tensioner so he got a dealer to install a new one (comes in a repair kit).

Before he had it replaced, there was a distinct rattling from the left hand side of the engine near the front.

Mine also intermittently demonstrates a sewing machine kind of tapping which increases with rpms (nonexistent at idle).Sound comes from same place within engine bay.

Now, the sound has disappeared on mine for a couple of months.It's a failing tensioner shock as well.

I drive a 1991 190e 1.8 and my pal drives a 1992 190e 1.8.My kid brother has a 1990 190e 1.8 and all of our cars have RHD and have the belt tensioner.

Yours should have it too coz our cars are similar to the UK spec 1.8s.

Cheers.
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[babybenz]

Yes, the OVP in your car is at the same position.I checked the W201 MB Service CD.

It s...

Yes, the OVP in your car is at the same position.I checked the W201 MB Service CD.

It should be a silver relay with a red top (updated version with two 10A fuses on top) or black top (with one 10A fuse).

Theres a clear plastic cover on the top of the relay that flips open to expose the relay(s).

You can then pull the relay(s) out for testing.

Cheers.[]

 

[babybenz]

Yes, the OVP in your car is at the same position.I checked the W201 MB Service CD.

It s...

Yes, the OVP in your car is at the same position.I checked the W201 MB Service CD.

It should be a silver relay with a red top (updated version with two 10A fuses on top) or black top (with one 10A fuse).

Theres a clear plastic cover on the top of the relay that flips open to expose the relay(s).

You can then pull the relay(s) out for testing.

Cheers.[]

 

[babybenz]

Yep, Duncan.

The one and only...[}:)]...

Yep, Duncan.

The one and only...[}]

 

[babybenz]

The rotary switch is a variable resistor for the EZL timing.

S infinite ohms, 0deg 98oc...

The rotary switch is a variable resistor for the EZL timing.

S infinite ohms, 0deg 98octane
2 2400 ohms, 2deg 95octane
N 1300 ohms, 4deg 93octane
4 750 ohms, 6deg 91octane (the US setting)
5 470 ohms, 8deg 89octane
6 220 ohms, 10deg 87octane
7 0 ohms, 12deg ???

In my car, and I believe it's the same on Duncan's, the switch is at position S.

Cheers.[]

 

[babybenz]

The one for the timing is next to the CIS unit on the left fender (with S and N marking).
...

The one for the timing is next to the CIS unit on the left fender (with S and N marking).

I also have one behind the battery (marked 1 to 7) set to position 1 by default but I do not know what it's for.

What is the current setting on your resistor?

Cheers.