Mercedes Benz

2020 Mercedes Benz Truck ML 63 AMG Technical Service Bulletin # S-83_30-134A Date: 111020 A/C - Musty/Moldy Odor Complaints, Cleaning Procedure Date: October 20, 2011 Order No.: S-B-83.30/134a Page 86 Supersedes: S-B-83.30/134, August 18, 2011 Group: 83 SUBJECT: MY-All, Models 164, 171, 203, 209, 211, 215, 216, 219, 220, 221, 230 and 251 Air Conditioning Musty/Moldy Odor Complaints Cleaning Procedure Under certain environmental conditions, typically in a hot and humid climate, the vehicle may emit a musty/moldy odor from the air conditioning system. This may be more noticeable when starting the vehicle due to residual condensation on the evaporator and on the interior surface of the heater box. Note: For the following model series 204, 172, 166, 212, 207, 218, 164 as of A407859, 251 as of A083326, 216 as of A012332, 221 as of A174161, equipped with recirculated air filtering and biocide-coated evaporator. In these vehicle models the evaporator can be ruled out as the cause of the ...