What does hunting idle mean on a Mercedes Benz 500SL?
Turn on the car, idle at 1,100 rpm. Then the idle is ‘hunting’ ( up/down). Driving the car, it is fine & smooth. A new throttle actuator, new engine wire harness, new tune-up. Car is never in “limp mode”. Has anyone actually experienced this problem, and found a fix? I promise. I am willing to donate. But so far I have been going round / round.
What’s the idle speed on a 1992 500SL?
I have recently purchased a 1992 500 SL which is suffering from a crazy fast idle. All values are with the gearbox in P or N position. When cold the idle is about 600-700 rpm which rises to about 1500 when warm and when all ancillaries are switched off.
Why is my Mercedes 500SL running so hot?
It is common for breather hoses to perish and leak, causing above symptoms on early 500SL. Maybe if you post part numbers of hoses replaced. We could be more certain. The mpg gauge fails on early R129s. The gauge becomes a bit wild before it goes. Swings back and forth quickly.
Is there a series 107 Mercedes Benz 500SL?
Years The Series 107 Mercedes Benz 500SL Was Produced: SAVE BIG $$$$$$ IN REPAIR AND MAINTENANCE COSTS!!!
Where does the Mercedes Benz 500SL come from?
In one form or another, Mercedes-Benz has been producing a two-seat sporty convertible since 1954 under the SL-Class moniker (SL standing for More Mercedes Benz 500SL W107 in a highly authentic condition. It originates from Suwanee, Georgia USA and has driven only 47.285 miles. The car still… More
What kind of car is a 1998 Mercedes 500SL?
1998 Mercedes-Benz 500SL, Red convertible with hard and soft tops. Great tires and in excellent condition.Cassette and CD players. More 1998 MERCEDES=BENZ 500SL CONVERTIBLE 2-TOPS 19,000 ORIGINAL MILES YEAR; 1998 MAKE; MERCEDES-BENZ MODEL; 500 SL BODY; CONVERTIBLE COLOR; RED TRIM; SADDLE LEATHER ENGINE;…
When did the Mercedes SL Class SL 500 come out?
No accident or damage reported to CARFAX… 1st owner purchased on 02/05/03 and owne… Last serviced at 77,970 miles in Hackett… 1st owner drove an estimated 0 miles/yea… No accident or damage reported to CARFAX…
Turn on the car, idle at 1,100 rpm. Then the idle is ‘hunting’ ( up/down). Driving the car, it is fine & smooth. A new throttle actuator, new engine wire harness, new tune-up. Car is never in “limp mode”. Has anyone actually experienced this problem, and found a fix? I promise. I am willing to donate. But so far I have been going round / round.
When did the SL500 body style come out?
This R129 body style SL500 was made from 1990 through 2002. It was called the 500 SL from 1990 – 1993. They all have just about the same suspension regardless of year or package. The “sport” packages are just trim and tires, not suspension, engine or drivetrain.
What should the idle speed be on a Mercedes Benz?
Normal idle, warmed up, should be right around 500 rpm. It should stay there very solidly.
When did Mercedes Benz stop making the SL500?
There are three major versions of the SL500, the first from 1990 – 1995, the best version from 1996 – 1998 and the final cost-reduced version from 1999 through 2002.
What’s the idle RPM on a Mercedes 500SL?
What is strange now is that if I start car cold, it does everything right, starts idle at about 1000 rpm then drops within a very short time to idle at about 550 rpm. All is well even while warming up but the moment I hit the gas and let off, the idle only drops to about 1100 rpms so it’s not just creeping up on its own like before.
What’s the idle control valve on a 1990 500SL?
500SL (1990) Engine Idle Control ValveThe engine starts well… Lou, I replaced the rotors, distributor caps and forward cam sensor in my 1990 500sl. I put 2 containers of Techron in a full tank of gas and let it sit … read more 300ce: 1989 benz ce300.
There are three major versions of the SL500, the first from 1990 – 1995, the best version from 1996 – 1998 and the final cost-reduced version from 1999 through 2002.
This R129 body style SL500 was made from 1990 through 2002. It was called the 500 SL from 1990 – 1993. They all have just about the same suspension regardless of year or package. The “sport” packages are just trim and tires, not suspension, engine or drivetrain.
What was the problem with the ASR on my 1992 500SL?
I started having a problem with the ASR system on a 1992 500SL. I was driving on the highway when the ASR sensor light came on and the car defaulted to a “limp home mode”: The engine output power was reduced and I was able to make almost home; after stopping at a red light the battery light came on and the car completely stalled.
What causes the ASR light to come on on a Mercedes 500SL?
Everything pointed to the Electronic Accelerator Actuator (that checked out okay as well). After discussing the past few months with the car, we established that my problem was moisture in the R25 sensor (throttle positioning sensor) causing the ASR light to come on and the engine to go into the LH mode.
Where is the fault code on a Mercedes SL?
The AC control unit in the R129 Mercedes SL model along with a few other MB models of the time (outlined in the CS1000 manual) could be accessed to diagnose system problems by retrieving fault codes directly from the AC control unit console in the car.
I started having a problem with the ASR system on a 1992 500SL. I was driving on the highway when the ASR sensor light came on and the car defaulted to a “limp home mode”: The engine output power was reduced and I was able to make almost home; after stopping at a red light the battery light came on and the car completely stalled.
What was the problem with my Mercedes 500SL engine?
Made it home and a friend, who owns a used car lot, suggested that I driver the car to his mechanic’s house (the mechanic, though not experienced in MB engines), thought it was coming from the top of the engine. Oil pressure was fine, and the engine was running smoothly, albeit with the noise.
What are the problems with a Mercedes Benz?
Top 5 Mercedes-Benz no start problems 1 Engine Click, No Start 2 Engine Dies Right After It Starts 3 Car turns over, but it won’t start 4 The car makes a clicking noise but won’t start. Hint: Starter Problem or Low Battery 5 Key will not turn the ignition More
What should I do if my Mercedes Benz won’t start?
Start the car and you should be able to get around 60 psi. When the engine is running and when you turn off the engine the pressure should stay steady. Always perform this test on a cold engine. Next, make sure that the fuel injector connections are secure and not loose. Check the fuel pump and the fuel pump relay.
Why does my Mercedes Benz engine misfire so often?
Engine misfires are one of the most common problems we see in many Mercedes-Benz cars. To be honest, it is not because MB cars are weak in this area, but because most owners forget that spark plugs are wear items and need to be replaced at the recommended intervals.
Why does my Mercedes C class run rough off-idle?
21 people found this helpful. Hmmm, so what you’re saying is it idles ruff but passed that part of the test and runs smooth off-idle but fails that part because it’s running too rich ( too much fuel). If you had a vacuum leak at the throttle body you’ll be running lean not rich as you are now.
How many spark plugs does a Mercedes Benz have?
Rember that Mercedes-Benz V6 and V8 engines utilize two spark plugs per cylinder. That is typical in Mercedes-Benz engines such as M112 M113 M272 M273 found on E, C, S, CL, CLK, ML, GL, G, R, SLK Class. For example, if you have an E320 (M112 engine) or E350 (M272) your car has six cylinders but requires 12 spark plugs.
Engine misfires are one of the most common problems we see in many Mercedes-Benz cars. To be honest, it is not because MB cars are weak in this area, but because most owners forget that spark plugs are wear items and need to be replaced at the recommended intervals.
How many miles does a Mercedes spark plug last?
They are wear and tear items. Standard copper spark plugs last up to 30k miles while iridium and platinum spark plugs can last over 60,000 miles. If your Mercedes-Benz has over 80,000 miles and still has the original spark plugs, it makes sense to change the spark plugs before you pour money on any other repair.
Where are misfire codes stored in a Mercedes?
Luckily for you, the misfire codes are stored in the ECU and are very easy (and inexpensive) to retrieve. To diagnose an engine misfire on a Mercedes all you need is a generic OBD II code reader that can be bought in some cases for under 20 at your local auto parts store or on Amazon’s Best Selling OBD II scanners list.
What to do if Mercedes check engine light is on?
1. Turn ignition to position II. All dash lights should be on. Don’t start the car. 2. Locate the OBD-II port under the dashboard. Location of OBD II port used to retrieve Mercedes-Benz fault codes. 3. Plug your OBD II scanner and let it turn on. Use an OBD II scanner to check why the Check Engine Light is ON.