GL 450 (164.871) V8-4.6L (273.923) (2007)
Shifter A/T: Technical Service Bulletins
A/T - Noises When Using 'Direct Select' Mode (Normal)
Date: August 15, 2006
Order No.: T-B-27.60/55b
Supersedes: T-B-27.60/55a dated Sept. 21, 2005
Group: 27
Revision History
SUBJECT:
Model 164.175/186/871
Model 251.165/175
Noises from the Transmission While Making "Direct Select" Gear Selections
In the above model vehicles with transmission 722.9 when the gear position is changed with "Direct Select", the mechanical gear selection process in the
ISM (Intelligent Selector Module) will produce an audible sound which can be heard within the passenger compartment (Netstar --> STAR TekInfo -->
EDAC --> Direct select diagnostic guide --> Sounds --> Hyperlink MP3.
Do not attempt to perform any repairs to the vehicle, as this is a normal operating sound inherent to the design of the ISM.