What's this for and should I be concerned?

1982-1993 :180E, 190E, 190E 2.3, 190E 2.6, 190D 2.2, 190D 2.5, 190D 2.5 T
Post Reply
oldmercfan
Pagoda
Posts: 157
Joined: Mon 24 Mar, 2014 7:32 pm
Model you own: w114
Location: Adelaide

What's this for and should I be concerned?

Post by oldmercfan » Sat 09 Feb, 2019 5:54 pm

Hi, poking around the fuel injection system on my 2.0 litre 190E (1985), I noticed this busted electrical connector that seems to go nowhere. The wire to the connector splits off a bunch of cables going to fuel injection system. No sign of any wiring on the other side of the connector. I would much appreciate your help to identify this. I was looking around because I have an off-again, on-again idle issue -- sometimes stalls when cold, sometimes idles too high when pulling up. Maybe the idle control valve? The pipes and wiring to the ICV look ok. There's also an intermittent smell of fuel in the cabin. Maybe its related to the idle issue, or the mysterious busted electrical connector to nowhere? The fuel mell is not due to a broken plastic fitting near the coolant temp for the fuel tank breather pipes. That was broken and making things smelly, but I replaced it and the smell is still around sometimes. Thanks in advance for any ideas.
You do not have the required permissions to view the files attached to this post.
1985 W201 190E (White)

Ivanerrol
Mercedes Demigod
Posts: 5967
Joined: Sat 12 May, 2007 2:21 pm
Model you own: w204
Location: Melbourne

Re: What's this for and should I be concerned?

Post by Ivanerrol » Sun 10 Feb, 2019 10:08 pm

That looks like the famous R16 resistor.
Used for ignition timing.
It looks like its only the surround broken.

Here's a full foto.

Image
W211 - E240
W204 - C280
Departed
W202 - C200, C180, C180
W126 - 380SE , 380SE (Ex SA Import), 560SEL
W124 - 300e, 260e (ex Japan)
W111 220s (Indonesia) 4 speed manual column shift
W123 230
W116 450SEL
W140 420SEL
W210 E240, E240
W209 CLK 240
W201 190e 2.6 (ex U.K.)

oldmercfan
Pagoda
Posts: 157
Joined: Mon 24 Mar, 2014 7:32 pm
Model you own: w114
Location: Adelaide

Re: What's this for and should I be concerned?

Post by oldmercfan » Mon 11 Feb, 2019 12:09 am

Thanks very much indeed. It certainly does look like that. My car is running sweetly without it on 91 octane -- no pinging, and the ignition generally seems great to me. However, Benz put it there for a reason so I will get a replacement. Maybe it will burn a bit less fuel and solve the fuel smell problem?
1985 W201 190E (White)

oldmercfan
Pagoda
Posts: 157
Joined: Mon 24 Mar, 2014 7:32 pm
Model you own: w114
Location: Adelaide

Re: What's this for and should I be concerned?

Post by oldmercfan » Mon 11 Feb, 2019 12:12 am

Sorry, add to that I get your comment about the fact that the resistor still looks to be intact and its the housing only that's broken. I will take a closer look and see if it is still in working order.
1985 W201 190E (White)

User avatar
Christo C
Maybach
Posts: 206
Joined: Fri 04 Jul, 2014 8:24 am
Model you own: w124
Region: New South Wales
Location: Sydney [Beaconsfield]
Contact:

Re: What's this for and should I be concerned?

Post by Christo C » Mon 11 Feb, 2019 9:02 am

oldmercfan wrote:
Mon 11 Feb, 2019 12:09 am
... and solve the fuel smell problem?
You say the fuel smell is still around .... perhaps this is your problem:

See that little black thing at the centre top of the picture in your original post - held on to the rear of the Fuel Distributor with two slotted screws?

That is the KE JETRONIC GOVERNOR (EHA VALVE) and older units have a tendency to develop hairline cracks and leak - the fuel supply is under tremendous pressure - so after running the engine for a few minutes, feel around and under the EHA valve for a fuel leak.

If EHA Valve is leaking it is not repairable, but still available from Bosch Australia online shop as a repair Kit (EHA Valve+screws+o-rings) - Bosch Part# F 026 T03 002 [merc part# 000 070 39 62] or can be ordered through your local independent Merc supplier.

If the EHA Valve isn’t leaking check all the Fuel Distributor lines; could also be the Fuel Injecor seals, which are very cheap & relatively easy to change.
Last edited by Christo C on Sat 16 Mar, 2019 7:52 pm, edited 1 time in total.
~Christo
1986 230E W124.023 M102.982 Thistle Green Saloon "Janis" 300,000+Km
Beaconsfield, SYDNEY

Ivanerrol
Mercedes Demigod
Posts: 5967
Joined: Sat 12 May, 2007 2:21 pm
Model you own: w204
Location: Melbourne

Re: What's this for and should I be concerned?

Post by Ivanerrol » Mon 11 Feb, 2019 10:57 pm

Is the fuel smell coming from the front or the rear?

Get under the car - safely - on the drivers side at the rear near the rear wheel there will be a plastic cover.
This cover hides the fuel pumps, accumulator and filter.
Make sure the plastic cover is not wet or there is evidence of leaking fuel.

When you find your smell - i.e. leak - fix it, then the car will run better.

Check the petrol cap door. make sure your car is able to be run on '91. They generally require minimum '95.
W211 - E240
W204 - C280
Departed
W202 - C200, C180, C180
W126 - 380SE , 380SE (Ex SA Import), 560SEL
W124 - 300e, 260e (ex Japan)
W111 220s (Indonesia) 4 speed manual column shift
W123 230
W116 450SEL
W140 420SEL
W210 E240, E240
W209 CLK 240
W201 190e 2.6 (ex U.K.)

oldmercfan
Pagoda
Posts: 157
Joined: Mon 24 Mar, 2014 7:32 pm
Model you own: w114
Location: Adelaide

Re: What's this for and should I be concerned?

Post by oldmercfan » Wed 13 Feb, 2019 3:01 pm

Thanks very much for taking the time to post the suggestions regarding my fuel smell. I will take off the air filter on the weekend and look at the black box, as suggested. That could indeed be the issue. I had noticed a bit of fuel in that area, but not around any of the injectors or fuel pipes. I also noticed some fuel sitting on the neck of the throttle body housing, right where the air filter housing sits against it. It did seem a bit odd to me and made me wonder if the fuel mixture was just too rich. There are no other symptoms of rich fuel mixture i.e. no black smoke from the exhaust, and the engine generally runs beautifully. I changed the fuel filter last week and am certain there are no leaks from that area under the car. Strangely, there's no octane rating printed inside my fuel filler door. I will run it on 95 from now on in any case.
1985 W201 190E (White)

oldmercfan
Pagoda
Posts: 157
Joined: Mon 24 Mar, 2014 7:32 pm
Model you own: w114
Location: Adelaide

Re: What's this for and should I be concerned?

Post by oldmercfan » Wed 07 Aug, 2019 8:53 pm

A post script to my thread. I replaced the EHA yesterday and all my problems were solved in an instant. No more fuel leaks or fuel smells in the cabin (it actually got worse after I replaced the o-rings in a desperate bid to avoid buying a new EHA), the intermittent unevenness in idle has disappeared, there's noticeably more power and my fuel economy appears to be much much better. (I only replaced the EHA yesterday). I was really reluctant to be screwed by Bosch for a replacement EHA, but it has proved to be well worth it. In case anyone wants to know, I paid $360 to buy from Prestige Auto Parts in Sydney. That's actually by far the best price I could find.
1985 W201 190E (White)

Post Reply

Return to “W201”