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.
What kind of engine does a Mercedes SL500 have?
The high performance 4-valve quad-cam engine was made from 1990 – 1998. The 1999 – 2006 V8s are only three valve, single overhead cam versions with less power and torque. The simpler, lower performance 1999 – 2006 SL500 engines have two spark plugs per cylinder and have the identical EPA MPG.
When did the Mercedes SL500 R129 go away?
They used a little less fuel than the first four speed automatic SL500s. By 1996 the new 5 speed transmission increased the fuel economy of the V8 SL500 to within 1 or 2 MPG of the SL320, thus the SL320s went away in 1998. Today you can get a beater early 1990’s 300SL for about $10,000.
How many miles can a 1998 Mercedes SL500 go?
In the 1998 and newer you can go about 12,000 miles between services depending on how the computer thinks you are driving. Many people don’t trust the computer and service more often.
What should idle speed be on Mercedes 500SL?
If the voltage is c. 70% of the battery voltage, then the fuel injection ECU recognizes that the throttle is closed, and it should be in its idle control routine. The next step is to measure the current output by the ECU to the idle speed control valve — it should be 700-1000 milli-amps.
They used a little less fuel than the first four speed automatic SL500s. By 1996 the new 5 speed transmission increased the fuel economy of the V8 SL500 to within 1 or 2 MPG of the SL320, thus the SL320s went away in 1998. Today you can get a beater early 1990’s 300SL for about $10,000.
The high performance 4-valve quad-cam engine was made from 1990 – 1998. The 1999 – 2006 V8s are only three valve, single overhead cam versions with less power and torque. The simpler, lower performance 1999 – 2006 SL500 engines have two spark plugs per cylinder and have the identical EPA MPG.
What does 8V mean on a Mercedes 500SL?
Ok. 8V at X11 with ignition ON but engine OFF, and coolant temperature less than 70deg C signifies all parameters are in order. With engine running you got 1-4V fluctuating at X11. This is equivalent to an OFF/ON ratio of 67% to 92%, which indicates a lean KE baseline mixture setting. Engine would be very unhappy.