Author Topic: Cold Start Relay  (Read 5212 times)

vegimite

  • Guest
Cold Start Relay
« on: February 18, 2016, 03:51:18 »
Hi everyone,
I have a faulty cold start relay in my 230SL has anyone had a similar problem?
I have disconnected it for the moment and have not had any issues with starting the car both warm and dead cold.
I live in a warm climate and was wondering if indeed I need it at all.
The only reason for going down this path is that the relays are deadly on price.

cheers.

Tyler S

  • Associate Member
  • Platinum
  • ******
  • USA, CA, Encinitas
  • Posts: 1613
Re: Cold Start Relay
« Reply #1 on: February 18, 2016, 06:52:01 »
Vegimite, have you made an attempt to repair your relay? The 4 housing tangs can be carefully bent back to remove the cover. Then the small points like contacts can be sanded clean. No guarantee but worth a shot. Yes they are pricey!
Tyler
1968 (67) 250sl. 4 speed manual. DB180 Silver
1955 220 Cabriolet A. White Grey
2019 E450 Wagon. Majestic Blue
1936 Ford PU Flathead V8. Creme on tan interior.
1989 Volkswagen T3 Westfailia Campmobile. Dove Grey (blue)

vegimite

  • Guest
Re: Cold Start Relay
« Reply #2 on: February 18, 2016, 08:59:40 »
Hi Tyler,
On further investigation its the round relay which I believe is called the  "Time Delay Switch".
what is happening from time to time it is malfunctioning and causing the cold start injector to work when the engine is hot and as a consequence too much fuel and the engine won't kick over as it's flooded.

I have no problems when it is disconnected. Hot or Cold start.   I will do as you suggest and have a look inside the unit.
thanks for your help.

Vegimite

Tyler S

  • Associate Member
  • Platinum
  • ******
  • USA, CA, Encinitas
  • Posts: 1613
Re: Cold Start Relay
« Reply #3 on: February 18, 2016, 15:32:33 »
Vegimite, Was not a factory installed relay. That time delay relay was an add on from the dealer for customers who complained of long crank times when engine was still warm. It should function for 1 second then turn off. You don't need it if you have no starting issues warm. Unplug it and remove the associated sub-harness that was added in under the square relay.
Tyler
1968 (67) 250sl. 4 speed manual. DB180 Silver
1955 220 Cabriolet A. White Grey
2019 E450 Wagon. Majestic Blue
1936 Ford PU Flathead V8. Creme on tan interior.
1989 Volkswagen T3 Westfailia Campmobile. Dove Grey (blue)

vegimite

  • Guest
Re: Cold Start Relay
« Reply #4 on: February 21, 2016, 22:18:21 »
Hi Tyler,
sorry for the late reply (busy) Yes I had done that.........and everything is fine.  The car was originally delivered to Blackburn in the UK so I guess being a cold climate the original owner had it installed. Thanks for your help.

Vegimite.

hands_aus

  • Full Member
  • Platinum
  • ******
  • Australia, Queensland, Brisbane
  • Posts: 1543
Re: Cold Start Relay
« Reply #5 on: February 26, 2016, 20:53:59 »
I thought the Time relay was actually installed in the 'early model' 230SL start up systems.
There were about 3 or 4 combinations of relays in the start up systems of the Pagoda over the series .
Adding a Time relay was an option in the later series 250, 280sl.
Bob Smith (Brisbane,Australia)
RHD,1967 early 250 SL #114, auto, ps , 717,717
best of the best

ja17

  • Full Member
  • Platinum
  • ******
  • USA, OH, Blacklick
  • Posts: 7384
Re: Cold Start Relay
« Reply #6 on: February 26, 2016, 23:28:47 »
The round time switch was used in MB versions I, & II. Version II includes the early 230SLs (aprox. up to Aug. 1965). It was discontinued on later versions IV and V with one exception. An optional add-on kit was available if starting problems developed. The kit included the round time relay.
Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2002 ML55 AMG (tow vehicle)
2002 SLK32 AMG (350 hp)
1982 300TD Wagon turbo 4spd.
1963 404 Mercedes Unimog (Swedish Army)
1989 flu419 Mercedes Unimog (US Army)
1998 E430
1974 450SLC Rally
1965 220SE Finback