2010 Mercedes-Benz GL550 Q&A

2010 Mercedes-Benz GL550 Question: Transmission may not shift into Drive it remains in P position , please help me

how to test if transmission control modulE is failed how to replace it? how much is it? -
Answer 1
Valve Body/Conductor Plate Recall on your gl550 read the TSB below Date: April 29, 2011 Order No.: S-B-27.00/120a Supersedes: S-B-27.00/120 Group: 27 Revision History Revision Date Purpose a 4/29/11 Clarification on Title and Parts order processing process - 4/8/11 Initial issue SUBJECT: All Models Equipped with 722.9 NAG2 (7G-Tronic) Transmission All Warrantable Model Years Diagnostic Verification for Valve Body/Conductor Plate Replacement Mercedes-Benz USA, LLC will begin Diagnostic Verification for 722.9 NAG2 Transmission Valve Body/Conductor Plate replacements starting on Monday, April 18, 2011. MBUSA has posted a Diagnostic Verification form for transmission replacements which can be found on: NetStar Æ Service Æ STAR TekInfo ÆDiagnostic Verification Proj. Æ NAG2 Valve Body/Conductor Plate Under this program, replacement of the Model Year 2004 through present Model Year 722.9 (NAG2) Transmission Valve Body/Conductor Plate will require verification that a replacement is necessary prior to replacement in accordance with the program terms summarized below. x The technician shall conduct an accurate assessment and complete documentation of the problem by submitting a Diagnostioc verification request through NetStar Æ Service Æ STAR TekInfo ÆDignostic Verification Proj. Æ NAG2 Valve Body/Conductor Plate. x Upon completion of the form, click on the ‘submit’ button to send the form to Dealer Technical Support(DTS). A Diagnostic Verfication case number will be displayed upon submission. Supporting documentation (e.g. Short Test, Control Unit Log, Freeze Frame Data & pictures of damaged parts where appropriate) must then be sent to diag-ver-valvebody@mbusa.com with the case number in the subject line as a reference. Once the form and supporting documentation are received, the case -
Answer 2
posss under warranty at dealer,or get a free est from aamco then shop prices -