Originally Posted by mcleantmw

I've pasted in a portion of the TSB for the radiator/transmission issue which has the vehicles listed that it applies to......pictures won't show. My radiator failed at 38,800 miles in April 2007 but I immediately noticed some acceleration problem with the vehicle and took it to my MB dealer that same day..........they only had to put in the modified-design replacement radiator and the torque converter, not the transmission, but a year later they did put in a new Transmission ECU.......all covered under my CPO warranty. The cost would have been several thousands of dollars if my warranty hadn't covered it. If I had been aware of the potential problem with these Valeo radiators, I would probably have requested they put in the replacement radiator as a preventive maintenance measure and that's what I'd recommend to anyone who has a vehicle listed on the TSB unless they still have warranty coverage. It can't be that expensive to pay for the labor and the replacement radiator install: For my 2003 E500, replacement radiator part #A2115003102 replaces the original installed Valeo part #A2115000202.

DTB
Date:
March 6, 2008
Order No.:
P-B-27.55/50g
Supersedes:
P-B-27.55/50f dated March 24, 2006
Group:
27
Revision History
Revision
Date
Purpose
g
3/6/08
Note Pertaining to Warranty Information Added to Page 4
f
3/24/06
“Perform Repair Based on Test Result” – Procedure Updated / Warranty Info. Updated
e
3/6/06
“Perform Repair Based on Test Result” – Procedure Updated
d
8/29/05
Warranty Information Updated
c
8/18/05
“Perform Repair Based on Test Result” – Step 2 Revised / Warranty Info. Updated
b
4/6/05
Addition of Note After Step 3 Pertaining to AMG Model Vehicles
a
2/17/05
Additional Applicable Models, Parts and Warranty Information Updated
-
01/27/05
Initial issue
SUBJECT:
Model 203.040/061/064/065/081/084/261/264/281/284/740/747/764
Model 209.365/375/376/465/475
Model 211.065/070/076/083/265/283
Up to Production Date 09/2003
Harsh Engagement Possibly Followed by Droning/Buzzing Noises During Light Acceleration Between Engine Speed of 1200 – 2500 RPM
If you receive customer reports in the above model vehicles of humming/buzzing noises or noticeable harsh engagement during gentle acceleration between engine speed of 1200 – 2500 rpm; this may be caused by incomplete adaptation of the torque converter, the transmission (EGS) ECU software or glycol contamination of the automatic transmission fluid. Follow the below repair procedures to resolve. Note: The condition is not intermittent and can be reproduced at all times. Note: The Glycol test must be performed only if:
a. the vehicle was produced before 09/2003,
b. the radiator is manufactured by “Valeo”, refer to Figure 1 for identification,
c. old crimping method used to assemble the radiator end tanks resembles Figure 2.
Figure 1 P-B-27.55/50
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Figure 2 P-B-27.55/50
Old Crimping Method Figure 3 P-B-27.55/50
New Crimping Method