1987 260E Problems - Mercedes-Benz Forum
 
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#1 (permalink) Old 03-08-2009, 03:04 PM
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1987 260E Problems

I have a 1987 260E. Has about 229,450 on the clock. It has been a great car. It's now getting to the point where I want to fix the little things that are wrong with it to make it a great car. Although its not my every day car I want to get it back up to snuff. There are two major problems and a couple of small minor ones that are keeping this from being great. If any of you guys could tell me how to fix or what to look for with any of these problems I would sincerely appreciate it.

1. Hard Starting this car can be a real pain to start sometimes. Sometimes it will start right up and idle pretty good. Other times you have to keep cranking it over and over about 2 or 3 times with the pedal pressed half way down to get it to start up. After that it starts ok. The fuel pumps are new, the OVP relay was replaced about 5 years ago and its the one with the Red Cap. The fuel pumps and filter were replaced 2 years ago. The plugs, wires, cap, rotor and alternator were all replaced back in June (9 Months ago). Was starting rough then too.

2. The cruise control isn't working quite right. I tried replacing the amplifier and sometimes it will accelerate and not hold. Other times it will accelerate and hold but be jerking. I looked in the Mercedes service manual and it said it might be the Hall Sensor behind the Speedometer others have said try another amplifier. Im starting to get confused. LOL

3. The SRS light is stuck on. How do I go about finding out the problem.

I know its a 22 year old car and im not surprised that there are problems with it. Its just I want to get a well running car and get that longevity the 124 is known for.
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#2 (permalink) Old 06-02-2009, 03:06 PM
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with the SRS, you will need a diagnostic check to find the fault.
usually means there is a low voltage problem with the airbag or seat belt sensors.

1988 Mercedes Benz 260E
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#3 (permalink) Old 06-02-2009, 05:08 PM
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Originally Posted by California260E View Post
I have a 1987 260E. Has about 229,450 on the clock. It has been a great car. It's now getting to the point where I want to fix the little things that are wrong with it to make it a great car. Although its not my every day car I want to get it back up to snuff. There are two major problems and a couple of small minor ones that are keeping this from being great. If any of you guys could tell me how to fix or what to look for with any of these problems I would sincerely appreciate it.

1. Hard Starting this car can be a real pain to start sometimes. Sometimes it will start right up and idle pretty good. Other times you have to keep cranking it over and over about 2 or 3 times with the pedal pressed half way down to get it to start up. After that it starts ok. The fuel pumps are new, the OVP relay was replaced about 5 years ago and its the one with the Red Cap. The fuel pumps and filter were replaced 2 years ago. The plugs, wires, cap, rotor and alternator were all replaced back in June (9 Months ago). Was starting rough then too.

2. The cruise control isn't working quite right. I tried replacing the amplifier and sometimes it will accelerate and not hold. Other times it will accelerate and hold but be jerking. I looked in the Mercedes service manual and it said it might be the Hall Sensor behind the Speedometer others have said try another amplifier. Im starting to get confused. LOL

3. The SRS light is stuck on. How do I go about finding out the problem.

I know its a 22 year old car and im not surprised that there are problems with it. Its just I want to get a well running car and get that longevity the 124 is known for.
Well lets start here, you are not in denial that the vehicle is 22 years young. When I first bought my auto back in 2005, similar problems as you have. I would start with the cold start valve and then progress up to the fuel injectors, to see if they are both operating to there full potential. My auto has been a project car for the last 4 years and slowly but surely its running fine. Then or before you may want to look in the DIY for info on fuel distributor adjustment. Good luck

Remember the way things used to be, we can never get that time back,so make the best of the time you have now, Life is short!, Break a few rules! Forgive quickly! Love truly, Laugh uncontrollably ... Good times become good memories bad times become good lessons.
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#4 (permalink) Old 06-03-2009, 06:53 PM
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ha, we have the SAME car, lol. Ive never seen another 87' 260E... well... I never see 260E's but yeh, I hav the same starting prblm to, it alweighs starts, it just takes it longer sometimes.
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#5 (permalink) Old 06-03-2009, 08:22 PM
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Your hard starting problem might be related to the ignition coil, type of plugs (non-resistor is recommended), cold start valve, coolant temperature sensor, or idle control valve, could also be loss of signal from crankshaft position sensor... does it sometimes die on the road?

Your cruise control problem is likely related to a burned out cruise actuator if it is "hunting" for the setting. Get ahold of the owner of GDL.

General Development Laboratories - Table of Contents

This is the best outfit to go to for fixing your cruise... if you describe your problems thoroughly to him you will get a very accurate assessment. From my experience... hunting is synonomous with burned out traces on the actuator. With your mileage this is totally feasible.
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#6 (permalink) Old 04-06-2010, 12:53 PM
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Originally Posted by ath20wj View Post
ha, we have the SAME car, lol. Ive never seen another 87' 260E... well... I never see 260E's but yeh, I hav the same starting prblm to, it alweighs starts, it just takes it longer sometimes.
I was looking at picking up one of these used....what should I look for as far as "Red Flags" go?

Thanks for any input you guys can give.
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#7 (permalink) Old 04-06-2010, 08:28 PM
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Exactly the same issues as the 300E. The 2.6 is no different.
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#8 (permalink) Old 04-06-2010, 08:49 PM
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Exactly the same issues as the 300E. The 2.6 is no different.
I'm new to Mercedes cars so what problems would that be?
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#9 (permalink) Old 04-09-2010, 07:16 AM
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did you ever change your wireing harness, it could be that your harnessis simply shorting out. dose it start better when it is warm. because if so the fuel ratio when cold starting might be off. the car is suposto have a richer ratio when cold.
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