W203 C180 Fuel Pump Replacement
Thread Starter
Member
Joined: Apr 2011
Posts: 100
Likes: 1
2001 w203 C180
W203 C180 Fuel Pump Replacement
Hi Guys
So on Saturday i heard a whinning/humming noise from the rear of the car. Placed my hand on the back seat and could feel a vibration. I figured its the fuel pump. The noise has stopped since.
I figured this is a warning sign and i have to change the fuel pump. I called the local MB dealership and they gave me a price of R3,169 ($360), however they informed me that on their system it shows that if im replacing a fuel pump i have to replace 2 fuel pumps, one on the left and one on the right. I cannot just replace 1 pump. Is this correct? the total price of both the pumps are R7,062 ($803)
So on Saturday i heard a whinning/humming noise from the rear of the car. Placed my hand on the back seat and could feel a vibration. I figured its the fuel pump. The noise has stopped since.
I figured this is a warning sign and i have to change the fuel pump. I called the local MB dealership and they gave me a price of R3,169 ($360), however they informed me that on their system it shows that if im replacing a fuel pump i have to replace 2 fuel pumps, one on the left and one on the right. I cannot just replace 1 pump. Is this correct? the total price of both the pumps are R7,062 ($803)
Thread Starter
Member
Joined: Apr 2011
Posts: 100
Likes: 1
2001 w203 C180
The fuel filter was changed under 2 years ago at 220,000kms, im now doing 310,000kms.. will change the fuel filter again when replacing the fuel pump, but not sure if i should buy the 2 pumps...
MBWorld Fanatic!
Joined: Jul 2005
Posts: 3,221
Likes: 11
From: Sydney, Australia
W203 slightly modified
Thread Starter
Member
Joined: Apr 2011
Posts: 100
Likes: 1
2001 w203 C180
Thanks benzmodz..
Do you perhaps know why should i change both the pumps and not just the malfunctioning pump? I asked the guys at MB why should i change both the pumps and there response was "According to their systems it says so"
I just like to know whats the need to change both the pumps...
Do you perhaps know why should i change both the pumps and not just the malfunctioning pump? I asked the guys at MB why should i change both the pumps and there response was "According to their systems it says so"
I just like to know whats the need to change both the pumps...
MBWorld Fanatic!
Joined: Jul 2008
Posts: 1,005
Likes: 0
2013 UFO
Reason why people get outrageous prices from the dealerships is because the replace the whole problem, not diagnose it and then find the main culprit. It saves them from you having to come back if the car happens to have something else wrong as well within the same system. It's easier on both parties except on the consumer pocket.
MBWorld Fanatic!
Joined: Jul 2005
Posts: 3,221
Likes: 11
From: Sydney, Australia
W203 slightly modified
Reason why people get outrageous prices from the dealerships is because the replace the whole problem, not diagnose it and then find the main culprit. It saves them from you having to come back if the car happens to have something else wrong as well within the same system. It's easier on both parties except on the consumer pocket.
Trending Topics
Member
Joined: May 2012
Posts: 219
Likes: 16
w203 / W211 / W219
I allready had that problem and also in Portugal I had to replace the 2 fuel pumps.
reason is (what they told me) that the original fuel pumps dont work perfectly from factory and later they redesigned the system to work perfect..so they dont sell anymore the older fuel pumps, and just sell the new ones.
so, we (all w203 owners that have some fuel pump problems on our cars) have to buy the 2 new pumps because is not compatible 1 pump of the new system and 1 pump of the older one...
reason is (what they told me) that the original fuel pumps dont work perfectly from factory and later they redesigned the system to work perfect..so they dont sell anymore the older fuel pumps, and just sell the new ones.
so, we (all w203 owners that have some fuel pump problems on our cars) have to buy the 2 new pumps because is not compatible 1 pump of the new system and 1 pump of the older one...
MB World Stories
The Best of Mercedes & AMG
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
Thread Starter
Member
Joined: Apr 2011
Posts: 100
Likes: 1
2001 w203 C180
Thanks edgarinho10, benzmodz and a3 german for the replies. Guess i will be changing both the fuel pumps.
Is it correct that the brand of fuel pumps used on the w203 is Pierburg and not Bosch?
Is it correct that the brand of fuel pumps used on the w203 is Pierburg and not Bosch?
Thread Starter
Member
Joined: Apr 2011
Posts: 100
Likes: 1
2001 w203 C180
So i replaced the fuels pumps in the car. But the noise is still there.
I noticed 2 things (possibly), the first is when the vehicle temperature reading shows 90-95deg i start getting the whine/humming noise from the fuel pumps and/or when the outside temperature reaches 32deg celcius or greater i start getting these noises.
When the noise starts, it does not affect the performance of the car in any way.
Any suggestions?
I noticed 2 things (possibly), the first is when the vehicle temperature reading shows 90-95deg i start getting the whine/humming noise from the fuel pumps and/or when the outside temperature reaches 32deg celcius or greater i start getting these noises.
When the noise starts, it does not affect the performance of the car in any way.
Any suggestions?
Super Member
Joined: Dec 2010
Posts: 712
Likes: 2
From: chicago
2005 c230 kompressor 2003 s500 94 wrangler
So i replaced the fuels pumps in the car. But the noise is still there.
I noticed 2 things (possibly), the first is when the vehicle temperature reading shows 90-95deg i start getting the whine/humming noise from the fuel pumps and/or when the outside temperature reaches 32deg celcius or greater i start getting these noises.
When the noise starts, it does not affect the performance of the car in any way.
Any suggestions?
I noticed 2 things (possibly), the first is when the vehicle temperature reading shows 90-95deg i start getting the whine/humming noise from the fuel pumps and/or when the outside temperature reaches 32deg celcius or greater i start getting these noises.
When the noise starts, it does not affect the performance of the car in any way.
Any suggestions?
Thread Starter
Member
Joined: Apr 2011
Posts: 100
Likes: 1
2001 w203 C180
Hi sammydragon3
This never happened before. And the noise is really audible. When the noise starts, a vibration can be felt on the rear seat. I dont think this normal. This happens when driving. Not on startup.
This never happened before. And the noise is really audible. When the noise starts, a vibration can be felt on the rear seat. I dont think this normal. This happens when driving. Not on startup.
MBWorld Fanatic!
Joined: Mar 2008
Posts: 3,714
Likes: 56
From: 1 hours drive north of Sydney Australia
2007 W204 220CDI Classic Sedan
I would take out the rear seat & see whether you can further diagnose the noise.
I wonder whether it is the diff or the exhaust system coming into contact with the body?
I wonder whether it is the diff or the exhaust system coming into contact with the body?
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Sewyn. See the Wiki. Take out the back lower seat squab ~ 4 bolts under covers along the front of the seat). There are two round hatches. Under the RHS you should find the fuel pump & sender & under the LHS a level sender only. (this is normal layout reversed on some cars). You do not require to change both. With the lower seat out & the piece of padding removed & the hatch covers off you will hear very clearly if the pump is making a noise.
When last did your car have a fuel filter? On your model it is outside the tank. See Wiki for location & servicing. If the filter is clogged the pump can get noisy due to aeration/cavitation.
Good luck! These are US pictures so drivers & passenger sides are reversed from yours.
Filter
When last did your car have a fuel filter? On your model it is outside the tank. See Wiki for location & servicing. If the filter is clogged the pump can get noisy due to aeration/cavitation.
Good luck! These are US pictures so drivers & passenger sides are reversed from yours.
Filter
Last edited by Glyn M Ruck; Dec 4, 2012 at 09:55 AM.
Thread Starter
Member
Joined: Apr 2011
Posts: 100
Likes: 1
2001 w203 C180
Thanks Glyn!
I did replace both the fuel pumps couple weeks ago with pierburg pumps.
Now the noise has started again. I did not change the fuel filter when replacing the fuel pumps.
I last changed the fuel filter about 95,000kms ago.
Maybe the filter does needs replacing.
I did replace both the fuel pumps couple weeks ago with pierburg pumps.
Now the noise has started again. I did not change the fuel filter when replacing the fuel pumps.
I last changed the fuel filter about 95,000kms ago.
Maybe the filter does needs replacing.
