4 Common Parts That Cause Car To Idle Rough, Stall or Die
Thread Starter
Senior Member
Joined: Aug 2005
Posts: 453
Likes: 0
From: Las Vegas
2005 SL600 by SPEEDRIVEN
4 Common Parts That Cause Car To Idle Rough, Stall or Die
There appear to be 4 parts that when they go bad on a W208 can cause the car to idle rough or hunt up and down, stall, and eventually die. You most likely will experience a check engine light (CEL). Based on others comments and posts, I have narrowed the possible problems to the following items, though there are certainly others:
(2) Air Mass Sensor
It is possible that the AMS is dirty or bad. You can clean the Air Mass Sensor (Aka Mass Air Flow Meter or MAF) and see if that makes a difference. If it needs to be replaced I can get it from $191.00 at Importecparts.com as well. Install takes about 10 minutes. Do not pay the dealer for the part or to replace this item if you don't have to.
(1) Crankshaft Position Sensor
You may find it hard if not impossible to locate a "Crankshaft Position Sensor" online because it is refered to as a "Reference Sensor". The dealer wants for $125.80.00 or so for this part. I found a site http://www.importeccatalog.com/) that has it for $91.00.
(3) O2 Sensors
These are fairly easy to replace as well. The dealer wants around $225.00 for these parts. You can get them from Importecparts.com for around the prices below:
Oxygen Sensor: Left Front
Located before catalyst
Cost: $155.20
Oxygen Sensor: Right Front
Located before catalyst
Cost: $155.00
Oxygen Sensor: Left Rear
Located after catalyst
Cost: $143.90
Oxygen Sensor: Right Rear
Located after catalyst
Cost: $115.70
(4) Fuel Filter
It appears that you can replace this in about 20 minutes and the part is $32.30 from Importecparts.com.
(2) Air Mass Sensor
It is possible that the AMS is dirty or bad. You can clean the Air Mass Sensor (Aka Mass Air Flow Meter or MAF) and see if that makes a difference. If it needs to be replaced I can get it from $191.00 at Importecparts.com as well. Install takes about 10 minutes. Do not pay the dealer for the part or to replace this item if you don't have to.
(1) Crankshaft Position Sensor
You may find it hard if not impossible to locate a "Crankshaft Position Sensor" online because it is refered to as a "Reference Sensor". The dealer wants for $125.80.00 or so for this part. I found a site http://www.importeccatalog.com/) that has it for $91.00.
(3) O2 Sensors
These are fairly easy to replace as well. The dealer wants around $225.00 for these parts. You can get them from Importecparts.com for around the prices below:
Oxygen Sensor: Left Front
Located before catalyst
Cost: $155.20
Oxygen Sensor: Right Front
Located before catalyst
Cost: $155.00
Oxygen Sensor: Left Rear
Located after catalyst
Cost: $143.90
Oxygen Sensor: Right Rear
Located after catalyst
Cost: $115.70
(4) Fuel Filter
It appears that you can replace this in about 20 minutes and the part is $32.30 from Importecparts.com.
Senior Member
Joined: Aug 2005
Posts: 386
Likes: 2
From: Cali
2000 CLK 320
that dam fuel filter took me longer than that, but it was a simple job. my car just hit 100k miles and its a 2000. so the hoses goin into the fuel filter were really stuck on there after loosening the clamps. i had to cut the hoses off and trim them about 1/2 inch. cost me 35 bucks for filter. dealer for sure woulda charged me over 150 for labor and part
MBWorld Fanatic!
Joined: Dec 2006
Posts: 1,308
Likes: 62
From: Bethesda, MD
2000 SL500
you forgot the main culprit of rough idle...engine mounts...you can get them for about 60$ each on ebay (there are 2) i got quoted 300$ for parts and labor for both from an indy mechanic...it makes the engine rattle like crazy behind a light...it causes a VERY rough ride...
Senior Member
Joined: Aug 2005
Posts: 386
Likes: 2
From: Cali
2000 CLK 320
question for u... recently i have been noticing a rough idle. but there is NO check engine light. its a lot more rough when car is on park, when i put it in gear it decreases. the rpm needle doesnt move, its just the car that seems to shake from left to right a little. any suggestions?? by the way,my car has 100k miles
Senior Member
Joined: Aug 2005
Posts: 386
Likes: 2
From: Cali
2000 CLK 320
