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· Registered
1987 190E
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13 Posts
Discussion Starter · #1 ·
Well, my 190E just will not crank in cold weather. The local Mercedes mechanic I take my car to couldn't figure out what was wrong because on the day I had it towed to him it started up every time he tried it (of course, it was warm weather when it got to him). He replaced the Distributor cap and rotor because they had a lot of carbon build up and generally looked real bad. The car was running a lot better when I got it back but then this morning a cold front moved in and it just won't start. Could this be a gas pump problem or what?

I also had a new alternator and battery put in a couple weeks ago. The spark plugs/wires are nearly brand new.
 

· Registered
1987 190E
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13 Posts
Discussion Starter · #2 ·
Ok. Well, I guess the problem isn't weather related because the car wouldn't start again...

Ok. Well, I guess the problem isn't weather related because the car wouldn't start again on Saturday and it was a warm day. It started and ran fine on Friday. I didn't try it Sunday but this morning it wouldn't start. I believe it's a fuel problem because when pumping the gas you can usually smell fuel after a few pumps as the engine gets flooded but I don't smell anything. I guess it's time to check the relays/etc. Anyone else ever have a similar problem?
 

· BenzWorld W126 & W201 Host
1988 420SE, 2002 C180 Kompressor, 200 ML320
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1,150 Posts
Fuel pump relay

Broda

The fuel pump relay is a common fault.
when you turn the ignition on but don't actualy crank the engine, you should hear the fuel pump run for about 2 seconds and then shut off. This primes the system.
if you don't hear any noise, either the pumps broke or the relay is not working.
 

· Registered
'86 300E; '86 190E
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67 Posts
possible fuel pump relay

I just replaced the fuel pump relay on my 300E. The symptom was: everything sounded fine except the car wouldn't start. My mechanic listened to the symptom and 'fuel pump relay' was the first thing he mentioned, without much pause (30 years experience). I think the fix will eliminate the occasional 'stop sign stall' that a lot of us experience. I will know what to look for when similar things start happening to 'Benny the Beast', my 190.[8D]
 

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· Registered
1987 190E
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13 Posts
Discussion Starter · #5 ·
Cool, thanks. I'll get the mechanic to check it. It's kinda strange what happens though....

Cool, thanks. I'll get the mechanic to check it. It's kinda strange what happens though. Some days like today it starts right up in the morning and starts fine all day and then on other days it won't start til the afternoon and on other days it won't start at all. I've also been keeping it in the garage since this started happening to rule out the weather parameter.
 
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