Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 08-21-2002, 05:41 PM
Posts: n/a
88 300E cuts out at 4500rpm

I bought an 88 300E with 117K on it. It fails emmisions test. Took it to shop and they said the engine cuts out at 4500 rpm and there is a rattling noise in the top end and a little puff of blue smoke. The shop said the next step is to inspect the top end for problems.

What does this sound like (besides me getting ripped off on my recent purchase)? I did get the car 3000 below book so I don't mind putting some bucks into it if I have to. The question is what could the problem be and how much will it cost.

Any ideas?



01 toyota tundra
00 toyota camry
88 mercedes 300E
Reply With Quote
Old 08-21-2002, 11:05 PM
public enemy
Posts: n/a
I suggest you start with a cylinder leak down test (take it to someone who can perform a leak down test rather than a simple compression test) and depending on the results go from there.
Reply With Quote
Old 08-21-2002, 11:18 PM
Registered User
Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,784
I suggest you try the RPMs on the road in low gear..
Some have a rev limiter for Park/Neutral when car is stationary to protect the torque converter...

You will know this also if you go above 10 MPH and put it in N and gas it to check RPMs...
Later 124s had this feature... give it a try
Reply With Quote
Old 08-22-2002, 08:12 AM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
IF someone replaced the fuel pump relay with one from a 190E 2.3 4 cylinder, then that is the rpm that the engine will cut off.
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
Reply With Quote
Old 08-22-2002, 05:26 PM
Registered User
Join Date: Apr 2002
Location: Surrey, Uk
Posts: 254
Worn camshaft lobe caused this on my 89 230TE. With less movement than there should be the hydraulic lifter pumped up at high revs until the valve hit the piston, hence the noise. Loss of power at that speed was caused by the valve not closing.

The 4 cylinder fuel pump relay is worth checking out as this would cause the power loss, but not the noise.
Mick J
'08 Chrysler 300CRD (MB OM 642 engine)
'95 E220 estate
'89 230TE (R.I.P.)
Reply With Quote
Old 08-30-2002, 12:24 AM
Posts: n/a
update on 300e with issues

The mechanic took off the valve cover of the 1988 300e which was not passing emmissions and making a rattle in the top end around 4500 rpms. I saw for myself worn out cam lobes and dirty crud all over the valve springs/rockers etc.
He and the service advisor told me that they were afraid to think about what the bottom part of the motor looked like if the top half looked this bad. They recommended one of two routes. A new 300e motor (rebuilt by Mercedes) for around $5k plus labor. Or a used low mileage motor from some place in Texas for around $2500 plus labor. It comes with a 2 year warranty. I opted for the used motor. I think when its all said and done I am gonna be in for about $5000 worth of repairs. Thanks to everyone for their suggestions. I know many on this board say the bottom ends of these motors are strong but I don't think I want to take the risk that a new top end won't make the bottom end fail. Although the mechanic said the motors are usually good for around 300K miles, I figure one of these used motors might get me around 200k.
Reply With Quote
Old 08-30-2002, 02:10 PM
Ashman's Avatar
Registered User
Join Date: Sep 2000
Location: Sherman Oaks, CA
Posts: 4,748
if you are going to replace the engine, you may as well pull the ehad on your engine and inspect the bottom end. The bottom ends are pretty much bulletproof.

'92 300CE - Sold
2004 C240 - C7 Wheels - Android Radio
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 05:30 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page